Emily is right, most pet stores only house multiple species together because it is cost effective and they don't have them that long since most are sold off within a reasonable amount of time. My local pet store houses their tomatos with painted frogs, cuban tree frogs and some type of small lizards. I visit the store 1 -2 times a week for frog food, and from what I have seen the lizards always end up dying within a week, they lose about half of the cubans they put in there as well. Just last week they called me with a painted frog they got in which they had already moved to the tank they had...it had died before I got there which was a couple days later. I've tried to explain this to them, but they tell me what I just told you. Whenever I pre-order any frogs from them I ask that they be kept by themselves in a small cricket carrier until I can pick them up. My advise would be the same though.... house the tomato by itself, don't risk it. In the end your frogs will be much happier