Yeah, most pet stores don't know jack. I hear most employees telling customers that pacmans NEED to eat rodents, even as froglets and that they do BEST on such a diet. A shop that I got my P. edulis from told me and another customer that it also needed to eat all rodents, and that the obeisity(sorry can't spell) is a sign of a healthy frog. The other customer was going to buy him, but I spoke up first so he could live atleast a few years longer on a proper diet. It's now eating mainly earthworms, and no rodents.
It's amazing how well you can do things when it's done the cheap way.
That's a very pretty frog.