Pet deposit for...chickens?!?

[Alyssa K.]

We purchased our first investment property this year, and are currently accepting applications. The property is on a 1/2 acre privacy fenced lot, so we are allowing pets as we figure with that large of a yard animal owners will be our primary market. For pets we are requiring a $200 nonrefundable fee to clean out the ac/ducting, and a $300 Refundable deposit per animal. However I just had someone request to bring chickens....Im fine with it, but have no idea what to charge for a deposit. They would obviously (hopefully) remain outside at all times, and I don’t think the above mentioned fees/deposits are practical or fair for chickens. Curious to see what others would require in fees/deposits for chickens?