Is there anyone left who would be surprised at the way animals are treated by business?
When animals are used to make money, of course you can't trust the users not to abuse the animals. The whole process, from breeding, to selling, to buying, is based on the belief that all animals are ours to use. The owners of animals are often outraged by the breeders and sellers, not understanding that without buyers the breeders and sellers could not exist.
The bottom line for the animals are the buyers - the owners of animals. Pet owners can't logically be excluded from the evils of the pet trade.