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Lump Under Rabbit’s Chin

Is it normal for a rabbit to have a lump under its chin?

By Karen Rosenthal, DVM, DABVP
Posted: November 27, 2009, 5 a.m. EST

Q: My rabbit, Peter, is about 8 months old. I just noticed a big lump under his chin. He is behaving normally, as well as eating normally. He spends his days wandering and exploring, and comes home at dusk for his tea and a good snooze. He is a male and has not been neutured yet. Friends have told me that the lump is often seen in male lop-eared rabbits. Is this true, or could something be wrong?

A: What this lump could be depends on the size of the lump and where it is located. What should have you most concerned is that the lump may be a sign of dental disease.

Dental disease is extremely common in pet rabbits. One of the first signs is a “lump” somewhere near the mouth, on the jaw or on the chin. The lump maybe an abscess or it may be a tooth root that is abnormally growing.

Many times, rabbits appear fine with early dental disease and show no signs of the dreaded disease. Visit a veterinarian who is familiar with rabbits. He or she will be able to tell you immediately if this is a serious problem associated with dental disease.

See all of Dr. Rosenthal's Critter Q&A articles>>

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Reader Comments
This roll you are describing sounds like what is called a Dewlap. This is what the female pulls fur from when she is building her nest. It is not uncommon for a male to have a small dewlap as well. I of course don't know how you decided the sex of your rabbit but the pet stores have been known to make mistakes so to be on the safe side you might want a second opinion LOL in "The House Rabbit Handbook" there are diagrams that tell you how to sex the rabbit. It's easy if you know where to look. Male or female I would be more inclined to think it's a dewlap than Dental disease since your little guy is eating and behaving normally. I hope this helps and you get to spend the next 10 to 12 years enjoying Peter, dewlap and all.
Sandra, Partlow, VA
Posted: 11/5/2014 5:25:54 AM
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