Rabit Ears

Question
I have this rabbit that i have been taking care for a few weeks now and i noticed that one of his ears is clogged up with something that is very thick. There seems to be dried blood in there as well. Now Every time i try to look at it he hops away. Now is there something i need to be worrying about here? Is there a way to care for his ears or is this a natural thing? The ear does not appear to be bothering him but i am curious.

Answer
Dear April,

It's not normal, and should be treated.  Rabbits don't show signs of pain readily.  Please see:

http://www.bio.miami.edu/hare/sickbun.html

This sounds like ear canker, caused by parasitic mites, and it can be treated safely with Revolution (selamectin) or ivermectin from your vet.  Find a rabbit vet here:

http://www.rabbit.org/vets

and read more about this and similar conditions here:

http://www.bio.miami.edu/hare/furloss.html

Please do not let this go untreated.  It is quite painful, and will get worse.

Dana