Better idea is to
not buy their animals. Buying an animal - yes, it is saving
that animal, but then they know they will continue to have sales on live animals, so ship in even more. Gaining sales = store replenishes supplies of that product.
If you don't buy from them, and tell your friends and family not to buy from them,
that is more likely to get the point across. Speak with your wallet. If that's the only place where you can buy non-living products, sure, use it - I still go to the one nearest us for Greenies, and rat food, and treats of all sorts. But I don't buy live animals there, because I don't want to send the message that I like the idea of selling that particular animal to whoever has the money to pay for it, regardless of their knowledge of said animal. (Like seeing people buying a tiny hamster cage and walking out with that and a Guinea pig...
)
Basically, buying an animal there is condoning the treatment of not only that animal, but all their other animals, present and future.
(I
have bought animals there in the past - used to be my primary source of my pet rats, because it's harder to send mammals than reptiles long distances, and there were no rat breeders around here - so I'm as guilty as anyone, and don't judge those people who do buy there. So don't get the wrong impression.
)