Dog ate chocolate?

ask a vet

Puppy chewing legs and licking penis

Species: Dog
Breed: Border Collie
Age: 3-6 months
Harley chews on himself constantly. He likes his penis, he chews on his legs, constantly.
I took him to class Thrusday and the trainer mentioned allergies or it could be behavior issues. He has an apt May 9 but should I take him sooner.


Online vet, Dr. Marie

Dr. Marie replied:

Sorry to hear that your little guy is chewing on himself so much. He sounds really uncomfortable.

Normally I would say that allergies are the main thing that would cause a dog to do this. Allergies often cause dogs to chew at themselves, especially on their legs. (But not so commonly on their penis.)

However, allergies are not super common in a puppy. You mentioned that your dog is 3-6 months old. It really is not that common for a puppy that young to have allergies. It's not impossible, but I am betting there is another cause.

The most common reason for a puppy to be itchy like this would be fleas. It's not always easy to see the fleas. You can read more information here on checking for fleas as well as treatment.

Another possibility is sarcoptic mange. This can cause very itchy legs and usually causes itchy ears and elbows as well. But again, it doesn't account for the penis being itchy. This is something you would need to see your vet to get a diagnosis for.

I have seen some puppies that have compulsive behaviors that cause non-stop chewing and licking of the penis.

But, with all of this said, I think that the most likely cause is fleas and the second most likely is allergies.

I would actually recommend that you see your vet sooner than May 9 if possible. If it's fleas you want to get on top of things before they get worse. The flea products in the store don't tend to work well, so you'll want to get a prescription product. If it is allergies then your vet can prescribe medication to help.

Hope things work out ok!

Dr. Marie


Do you have a pet website? Interested in learning more about SEO for Wix?


Check out our dog age calculator and cat age calculator.

Want to receive pet coupons, vet advice and info on new pet products in your inbox?

* indicates required

We'll only send you great stuff, never spam. Unsubscribe any time.

Disclaimer: Although Dr. Marie is a qualified veterinarian, the information found on this site is not meant to replace the advice of your own veterinarian. AskAVetQuestion.com and Dr. Marie do not accept any responsibility for any loss, damage, injury, death, or disease which may arise from reliance on information contained on this site. Do not use information found on this site for diagnosing or treating your pet. Anything you read here is for information only.

Customer reply:

He take flea stuff provided by the vet. It's not fleas.
Can he have a nervose habit of chewing.


Online vet, Dr. Marie

Dr. Marie replied:

This is certainly possible. However, I can't recall ever treating a dog this young for obsessive grooming due to a behaviour problem.

Your vet may decide to try a hypoallergenic food trial. Again, allergies are not common at this age, but if they are present, food allergies tend to be more common than environmental allergies.



Search for similar questions:

ask a vet

Popular questions...

Dog's eye is closed. Hello, My dog was playing with his toy and shaking it around and when he was... (44441 views)

Boxer bleeding from mouth. Hello my dog has just started bleeding from his mouth its not alot alot but it is... (72328 views)

Are raisins toxic to cats? Hello, On Monday of this week (today is Wednesday) my cat came up to me while I... (36004 views)

Kitten with yellow diarrhea. Hi. My neighbor just called me about three days ago and asked if i would help nurse... (14036 views)

Green penile discharge. Hi, I have a 7 month old alaskan malamute. I have noticed that he has green... (21723 views)

Puppy knuckling on back legs. Hi I have a pug who is 5 months old, he was fine until about 2 week ago. He started... (10036 views)

Cat died after intestinal surgery. Hi, I tried to send email this morning but some how pay pal didn't take me to right... (11803 views)

Arthritis medicine I have a 10 month old Pomeranian who appears to have hip problems. I am very low... (9994 views)

1 month puppy can't poop. She has been constipated for 3 days. We have put half tsp. olive oil in food, giving... (17398 views)

calamine lotion on dogs Doeden has a itchy rash, raised pale bumps, on the back of his neck; I put on some... (102431 views)

See all questions...

Dr. MarieDr. Marie is a veterinarian who practices in a busy animal hospital in Ottawa, Ontario. She created Ask A Vet Question as a resource for good, accurate veterinary advice online. Dr. Marie treats dogs, cats, hamsters, guinea pigs, and rats. She has been a vet since 1999.

Is an online vet visit just as good as a trip to your veterinarian? No! But, many times, asking an online veterinarian a question can help save you money. While Dr. Marie can't officially diagnose your pet or prescribe medications, she can often advise you on whether a vet visit is necessary. You can also ask Dr. Marie for a second opinion on your pet's condition.