My honest opinion is to stop giving that store any money at all, however I realize that's not really an option in your situation. Absolutely do not give them any money for this animal. They would likely just get another to sell in it's place, thus starting the cycle over. If the same animal has been there that long they may be willing to give it to you just to not have to keep feeding it, but I doubt it. And considering your situation, you may not want to make too much fuss, since you have to continue to shop there. However, consider getting your supplies online, you may find yourself saving a lot of cash. And if you can drop that store, you'll have the option of telling them exactly why. I pretty much had to bite my tongue for several years till I found a monthly expo I could get to, but I stopped frequenting my local store for various reasons.