*I* would... you can't really be too sure, and it would suck to bring these two down with the newbies :/ I don't know about PetCo, but I've spoken to the head veterinarian at PetSmart, and they've taken great pains to ensure that the frogs they get in are clean. STILL. . . better safe than sorry, I think. 3 months is a killer QT period. . . I'm hoping mine breed and I can get my NEW frogs from in-house, so I know they'll be okay, lol!!!