I can understand that, in purchasing the shop, you need to deal with the pups and kittens already there. And you don't sound like you are going to keep offering pets, unless through a rescue / adoption. So I don't see you handling the pets which come with the purchase as being an issue.

As many have said, the issue is the source of the pets. It is their PARENTS who suffer at the mills. As well as the pups on the way TO the pet store. Here is a link to a thread I posted recently about the puppies at our local pet shop.

http://petoftheday.com/talk/showthread.php?t=137878