Male Dog Penis And Sheath Discharge

The phone call started in an ordinary way, “Dr. Randolph, I need to make an appointment for Gus.”

A quick glance at Gus’ file in our computer system showed he wasn’t due for a routine visit, so I inquired of his owner about possible problems as a reason for the visit.

“He has a yellow-green discharge from his penis.”

A yellowish to greenish small-volume discharge from a male dog's sheath is normal.

I closed the appointment book, and pressed F1 on the keyboard, sending the computer software back to the Main Menu.

“No appointment needed,” I explained to Gus’ master. All male dogs have a yellow-green discharge. It’s actually coming from the sheath, not the penis. Quantity can vary from undetectable to a drop, but it’s all normal.”

The material, which looks much like pus to the naked eye, is actually made of cells and lubricant fluid that surrounds the penis inside its protective sheath. It has a pungent, acrid smell and will sometimes be noticed where a male dog has lain.

Discharges from the sheath with other characteristics, such as blood, or a large volume of material that resembles pus, would be a cause for concern.

As for me, I’ll just have to wait for a big, sloppy Gus-kiss until another day.

See you tomorrow, Dr. Randolph.

53 Comments to “Male Dog Penis And Sheath Discharge”

  1. Desiree 2 May 2016 at 7:40 pm #

    Hello, I have read the article, as well as all of the comments. We adopted a 2 year old JRT yesterday and noticed a lot of discharge from down there. Is it only some dogs that get it as we have 2 other male dogs who don’t appear to get it or aren’t noticible. (Could be the dark fur colour as our new guy has white fur there). He seems to have a lot of hair around that area – and the greenish/yellow discharge seems to be sticking to the hair. He’s peeing normally and doesn’t seem to be licking it. I just find it gross as I haven’t experienced this with other dogs before. If I cut or trim the hair around that area – would that make a difference to keeping it clean at all? It is not dropping but I’d say about a dime size amount on him, some on his peepee and most on the hair. Thank you for your time!

    • Dr. James W. Randolph 3 May 2016 at 12:07 pm #

      I would not recommend cutting the hair of the prepuce. Sometimes this normal material can collect there, and sometimes a little urine can, too, but I’ve never seen it be a problem. Thanks for reading, Dr. Randolph.

  2. Beamthepitty 22 April 2016 at 10:26 pm #

    Hi, about a week ago my 7 year old male pitbull (desexed) had the tip of his red penis out and it wouldnt go back in so on closer inspection it had alot of sand and grit around it so we cleaned it and it went back in. We noticed this morning however that he had discharge like the above picture on it. It does sound like the normal discharge but considering we have never seen any fischarge before and what happened last week should we get him checked out? When we pulled the skin back to have a look his whole red part was covered in it. Thanks Dr, really appreciate it!

    • Dr. James W. Randolph 23 April 2016 at 3:15 pm #

      My biggest concerns comes from the part of your comment that says, “had a lot of sand and grit around it.” That could represent an abnormal crystal buildup in his urinary tract that could mean he has kidney and/or bladder stones, or that he is prone to developing them. Make an appointment with your veterinarian. To be properly prepared, fast your pet for 12 hours prior to the appointment (no food, no water) and have him go about 6 hours without urinating so that your pet’s doctor can obtain a urine sample for testing. If you find that sand/grit again, be sure to photograph it and show the photo to the veterinarian, also.

  3. Jenna 16 April 2016 at 11:15 am #

    Hi I also have a related question, 2 weeks ago I brought my service dog in for a check up as we noticed the discharge in the picture above and it was determined that it was potentially a bladder infection. Antibiotics were prescribe (Tribrissen). Later that night my dog had what looked like an extremely painful erection for 10 mins at least. I called the vet and they did x-rays, blood work, and a prostate exam. Nothing was out of the ordinary meanwhile he had trouble with the abtibiotics, vomiting after taking then,vet tried clavamox and same result. Was told to keep him off antibiotics now and since he has had 3 different erections at random times, he wasn’t licking or anything to cause it, he is nuetured and even as a pup never exhibited much sexual behavior. Right now the vet is at an impass. Any suggestions? He is a 1 yr and 5 months old, lab/retriever mix. There are no other dogs in our home, but 2 cats.

    • Dr. James W. Randolph 16 April 2016 at 2:31 pm #

      That’s quite a puzzle, Jenna. It’s not terribly unusual for patients to vomit during oral antibiotic therapy, so you might ask your veterinarian if your dog is a candidate for Convenia. It is also not unusual for neutered dogs to infrequently become erect. However, frequent erections, especially with pain, that’s uncommon. Is he taking any other medications, especially corticosteroids?

  4. kayla 13 April 2016 at 2:29 pm #

    Hello, my dog has a little mucus looking stuff coming from his thing kinda like in this picture but I read online that dogs can get STDs. Could this be a sign of an STD?

    • Dr. James W. Randolph 13 April 2016 at 2:54 pm #

      Only your veterinarian can say for sure. Please call for an appointment. Some of those conditions to which you refer can be transmitted to people through contact.

  5. Rosieee7 14 March 2016 at 1:22 am #

    Hi Dr. Randolph my dog is a male and his private area has become bright red and looks to be inflamed, and has yellow discharge and licks himself a lot. Is this normal? It started yesterday but we didn’t think anything big from it because it was not noticeable but today it got worse. What could it be?

  6. Sandraulloa 11 March 2016 at 10:30 am #

    My 10 month old Great Dane is having that same discharge. But he is always licking it and his mouth always smells as gross as that discharge…I was reading online that it could be a penile infection…What do you think?

  7. MA 28 February 2016 at 5:50 pm #

    My dog is only about a year and half. He’s penis is the red thing, thats what it looks like but today when he was sleeping only the top of the usual red penis was out and the rest was covered in something darker red that looked lumpy.?

    Also he has this fishy smell coming out of his butt from time to time.
    I would really appreciate your help, thank you.

    • Dr. James W. Randolph 29 February 2016 at 10:54 am #

      Your hometown veterinarian is going to have to look at your dog’s penis and tell you whether it is normal or abnormal.
      The smell you are detecting is probably coming from his anal sacs. Click here to read about anal sacs. While your pet’s doctor is looking at the penis be sure to mention the anal sac odor, too.

  8. Casper 27 February 2016 at 9:19 am #

    I admire your patience Dr. Randolph

    READ THE COMMENTS PEOPLE YOUR QUESTION MAY HAVE ALREADY BEEN ANSWERED!

  9. Alexys 14 February 2016 at 9:17 am #

    I noticed that my dog has had this discharge for about a week. As you say it is normal. I had noticed it really makes him smell kind of like an irony stench… is that normal?

    • Dr. James W. Randolph 14 February 2016 at 8:36 pm #

      I quote from the article: “It has a pungent, acrid smell and will sometimes be noticed where a male dog has lain.” I think it is more objectionable to some people than others. For me, I’m in agreement with you: “stench” really captures it! Thanks for reading, Dr. Randolph.

  10. Sjfox2006 28 January 2016 at 4:03 pm #

    I understand that the discharge for the male dog is normal but I’m wondering if this will go away after he is fixed?

    • Dr. James W. Randolph 28 January 2016 at 5:02 pm #

      Yes, the penis and its sheath will not behave differently, except that most dogs are unable to obtain erection after neuter surgery and no dogs are capable of impregnating females after neuter surgery.

      • LaurLayton 8 March 2016 at 12:43 am #

        My male dog is neutered and we just noticed about a month and a half ago of this discharge coming from his penis. It’s horrendous and it stinks up the entire room. It doesn’t look much like pus but a green liquid. Is there any way to make this stop? He sleeps in bed with us, but it is happening more frequent and keeps getting this all over the pillows so as soon as it comes out we smell it and it wakes us up. And have to wash sheets in the middle of the night.

        • Dr. James W. Randolph 20 March 2016 at 5:35 pm #

          If your husband had this problem would you take him to see his doctor? Your pet needs to see his veterinarian right away.

  11. pippiduke 21 January 2016 at 5:51 pm #

    hi my dog oki has greeny yellowy pus coming out of his penis he doesn’t won’t do anything should I take him to the vet

  12. Chelsea 19 January 2016 at 3:32 pm #

    My dog doesn’t want to do anything at all. He whines when I touch his back legs he doesn’t want to eat his dog food or drink water. He constantly shakes and he can barley walk. This has been going on for 2 days. Should I take him to the vet?

  13. Shanessa 25 December 2015 at 6:01 pm #

    My male dog has a thick cheese like sheath behind his sheath what can this be??

    • Dr. James W. Randolph 25 December 2015 at 11:12 pm #

      I cannot say. He will need to see his veterinarian as soon as the holiday is over.

  14. anna 8 December 2015 at 9:42 pm #

    hi doctor..my dog doesnt want to eat his dogfood he preffer to eat table foods…what should i do to my dog?he loss his weight now..thank you so much..

    • Dr. James W. Randolph 9 December 2015 at 4:57 pm #

      As the human in the relationship, you control what your pet eats. Put down dog food for him to eat. Don’t make people food available to him. Problem solved. If needed, you can use a little canned food mixed with warm water to make some “gravy.”

  15. Jedidiah 16 November 2015 at 6:20 am #

    Hi doctor Randolph, I recently adopted a 6 month old cross breed and am trying to toilet train him by putting him in the toilet until he eliminates then he can come out. However, his only urinates once or twice a day as compared to the usual 3 to 4 times a day when I brought him down. His urine is much smellier and yellower than most dogs. Although he pees very occasionally,the amount of pee is considered little. Is there anything I can do?

    • Dr. James W. Randolph 17 November 2015 at 7:14 pm #

      The “smelly” urine is a concern. I’d suggest you make an appointment for an examination and urinalysis. When you call for your appointment ask about preparation instructions to arrive for urinalysis. Best wishes, Dr. Randolph.

  16. brandie 27 September 2015 at 7:44 pm #

    My male dog has been leaking greenish discharge from his penis. This has been going on for 1year. It’s everyday that this happens. We thought it was normal but, now I have no clue what’s going on. He is not fixed. He is 5 years or older. Boxer mix breed.
    What could be happening? If I get him fixed will that help? Could he have soming wroug with him, how can I fix it? Could this be prostate cancer? Help me please. Thanks

    • Dr. James W. Randolph 28 September 2015 at 1:23 pm #

      As I said in the article, a yellow-green discharge from the sheath is normal. Whether your dog’s discharge is normal can only be determined by his local veterinarian. In the five years he’s had this discharge he should have had at least five examinations by his doctor. I suggest that you make an appointment for another examination, point out the discharge to the doctor and ask him to palpate the prostate on the same visit. If he determines there is a problem he might recommend cytology on the discharge. However, if it’s normal, what a great peace of mind you will receive! Thanks for reading, Dr. Randolph.

  17. Theresa 5 August 2015 at 9:44 pm #

    My rescue dog got neutered a few days ago and he has a greenish yellow substance coming from his penis. Is that normal?

    • Dr. James W. Randolph 6 August 2015 at 9:26 am #

      Theresa, the only way to be sure there is no problem is to have a urinalysis and perhaps cytology on the discharge. The surgeon who neutered your pet should be happy to see him to evaluate the discharge. Without seeing your pet, no one can say for sure that there is no problem, because abnormal discharges do occur in the sheath, and excessive licking indicates a problem, while a certain amount of licking is normal. Please report back and let us know what your pet’s doctor says. Dr. Randolph.

  18. Naomi 2 August 2015 at 1:52 pm #

    Dr. Randolph, thank you so much for providing insight here!

    My male dog has just started having the kind of discharge you describe. He’s 9 months old and neutered, so I don’t know if this is simply the age that dogs begin to have this happen, or if this is the onset of an infection. I just started seeing the discharge a couple of days ago. There’s no dripping, but it seems like a fair amount; if I clean it off, another “dot” has formed within an hour or less. But he is peeing normally (it seems to me), playing, eating, drinking water, etc.

    To add to the confusion, one vet said bring him in for antibiotics (but couldn’t get me in the same day), and another vet said “it’s normal”. What should I do? Any thoughts are much appreciated.

    • Dr. James W. Randolph 3 August 2015 at 12:42 pm #

      Naomi, the only way to be sure there is no problem is to have a urinalysis and perhaps cytology on the discharge. Without seeing your pet, no one can say for sure that there is no problem, because abnormal discharges do occur in the sheath, and excessive licking indicates a problem, while a certain amount of licking is normal. Please report back and let us know what your pet’s doctor says. Dr. Randolph.

  19. William 20 July 2015 at 5:58 pm #

    My dog has a thick, cheese like substance on his penis. It is putting off a horrible odor is this something that I need to be worried about? Should I clean it off? If so how?

    • Dr. James W. Randolph 20 July 2015 at 6:01 pm #

      “Horrible odor” is the operative phrase here, which means your dog needs to go and see his regular veterinarian as soon as humanly possible. Best wishes, Dr. Randolph

  20. Alice 22 March 2015 at 2:05 pm #

    My dog is a springer spaniel x border collie. The fur around his penis is white. I noticed last week that it had gone a greeny yellow colour. Today it’s even worse, he’s been cleaning it. I’ve looked at it closer and it seems quite sticky. Is this normal?

    • Dr. James W. Randolph 23 March 2015 at 1:47 pm #

      Normal sheath discharge can be yellow, white or green or a combination of colors. There is only one way to know for SURE if YOUR dog’s discharge is normal, and that’s the make an appointment with your veterinarian. As for “cleaning it,” a little bit of licking of the sheath orifice is normal, but if it’s excessive, especially if he is licking enough to induce redness, it’s all the more reason to call for an appointment. Please keep us posted on his progress. Best wishes, Dr. Randolph.

      • hannah1 2 June 2015 at 11:51 am #

        My male GS has this discharge and it’s to the point to where he is dripping as he walked through the house. I have never seen a dog have as much as he does, he also licks himself a lot. It very annoying. Do you think he should get looked at or is it normal for him to drop all over the house?

        • Dr. James W. Randolph 2 June 2015 at 12:48 pm #

          Yes, ma’am, there should never be “drippage” from the sheath. Your dog definitely needs a good examination, including palpation of that entire region and regional lymph nodes. If he has ever been bred, he also should have a Brucella titer test. Best wishes, Dr. Randolph.

  21. Jane lunt 21 March 2015 at 3:07 pm #

    my male black Labrador has a smelly penis, but no discharge.
    It is attracting a lot of attention from other dogs, which he doesn’t like.
    Any advice please.

    • Dr. James W. Randolph 22 March 2015 at 7:21 am #

      Jane, I find the normal discharge from the male dog’s penis to have an acrid odor. It that’s what you’re smelling (and you, like me, might have a very sensitive nose), you need do nothing. However, sometimes foreign materials get into the sheath and can cause a very uncomfortable, even dangerous inflammation. I suggest a good examination by your pet’s doctor. He should always be available to answer your questions during regular office hours, calling you back if you leave a message.

  22. Bronkeda 6 March 2015 at 4:25 pm #

    I Have Been Noticing That My Dog Has Small Amounts Of Fyr Missing On The Back Of His Hind Legs And His Ears. Is This Bad ? What Should I Do ?

  23. Jenstl 5 January 2015 at 2:30 pm #

    My dog has been leaving marks allover our leather couch from it and its pretty gross ! Is there a way to get rid of it? It doesn’t smell to me but my other dog seems to really notice the smell a lot which is frustrating for me and the dog being harassed. Any thoughts ?

    • Dr. James W. Randolph 8 January 2015 at 3:14 pm #

      A normal discharge from the prepuce does have a distinct, acrid odor, but “all over our leather couch” sounds like an excessive volume and should be checked out by your veterinarian. “Hiding” inside the prepuce masses, foreign bodies and other problems can get to be pretty serious. Transmissible Venereal Tumor can even be passed to people simply by touching the mass; all are good reasons to get an appointment right away. Please write back and let us know what your pet’s doctor finds. Best wishes, Dr. Randolph.

  24. Ashlaii 24 February 2014 at 5:24 pm #

    My female kitten has the same problem and it’s been going on for a couple of days, should I be worried? I’m trying to take her to the veterinarian sometime this week.

    • Dr. James W. Randolph 26 February 2014 at 5:47 pm #

      Your kitty should see her veterinarian as soon as you are able.

      • Ashlaii 28 February 2014 at 1:55 am #

        I took her to the ER last night after I couldn’t get an appointment until the weekend, the veterinarian said she’s pregnant (which I’m extremely happy about) and the discharge is normal. I continue to worry. She continues to have this discharge and she is grunting a lot, is this normal? What does the grunting mean? It sounds to me as if she’s complaining about something. Is she in pain? Please help!

        • Dr. James W. Randolph 2 March 2014 at 3:16 pm #

          Ashlaii, I would be delighted to help, if I could. However, I can’t be there to examine your pet or to hear her grunts or to determine whether she is expressing pain. All I can do is to encourage you to continue to consult your local veterinarian, who has examined your pet and, thus, has some insight. If the grunting is a new problem, not present at the time of the first examination, he may need to see her again to evaluate it.


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