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Rabbits/Hair loss/ large brown spot on bunny back


Spot on bunny a back
Spot on bunny a back  

The thinning hair spot
The thinning hair spot  
I've noticed a spot on my rabbits  back that looks like it was thinning. I haven't thought much about it, because all my pet are shedding . But today I noticed a large dark brown spot, about the size of a quater . It's flat and soft, feels like some hair is starting to grown there. He's a in door bunny, and he's eatting and drinking fine even still playing with his toys. I haven't let him out of his cage as offen as I used to in the past, do you think he's board and over grooming himself. Or should I visit my vet? He's 3 years old and I've never had a problem with him before. Not sure what to do?

Dear Charlotte,

This looks like a spot where the fur fell out (mosquito or flea bite?  another rabbit grooming him too much?  fur plucked out?), but is growing in normally.  It doesn't look alarming to me.  Just keep an eye on it, and I'll bet it is normal in a week or so.

For information on some causes and treatments of abnormal fur loss in rabbits, please see:

Hope that helps.



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Dana Krempels, Ph.D.


I've lived with companion rabbits for more than 35 years, and consider them members of my family. I can answer any questions about the biology and health of rabbits, from the commonplace to the unusual. But please note:

RULE #1:

Find a rabbit vet at for immediate help, and don't risk your bunny's life by spending time asking questions online! If you can't get in touch with your vet, read these Emergency Sick Bunny Instructions.

If you have found a wild baby rabbit, please read these EMERGENCY INSTRUCTIONS FOR WILD BABY RABBITS and then use this link to FIND A LOCAL WILDLIFE REHABILITATOR who can give you the right advice.

RULE #2:
Help me help you! Please make your subject line informative if you have an urgent question. then LET ME KNOW IN THE SUBJECT LINE so I can give your question highest priority over non-urgent questions. If you don't do this, then I can't guarantee timely assistance!

For all the best, most accurate rabbit health, care and behavior information, visit The House Rabbit Society.


I have been rescuing and rehabilitating domestic and wild rabbits for about 30 years. I have written articles for many rabbit rescue publications, as well as for the veterinary journal, Exotic DVM. I own EtherBun, the internet's largest listserve dedicated to health, care, and behavior of domestic rabbits.

Houserabbit Adoption, Rescue, and Education, Inc. (H.A.R.E., Inc.) president National House Rabbit Society (Board member)

Exotic DVM
Warren Peace (Journal of the House Rabbit Society of Miami)
Various newsletters of the House Rabbit Society, nationwide

Ph.D - Biology
B.S. - Biology
B.A. - English

Awards and Honors
Lightspan Academic Excellence Award for web site on rabbit health and biology

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