There are a number of background characters who are citizens of animalia. (Some of them get murdered) Just so long as you can do multiple voices and got a good range, you're good to do whatever.

You'll also need to voice Martha, a cowardly old woman who tried to murder a puppy. Do you have a range that can stratal "nice" and "cruel"? Victim, and abuser? Then maybe this role is for you!

There are 2 different voices you'll need to do.