Hello BFGirl!
Welcome to the forum! We would love your input about the frogs...and will be happy to help you all we can with your new betta(s)!
These fish can be very finicky...they are also tempermental to changes. It could be that he isn't used to the food you are offering or he is just taking his time adjusting to the change in environment...or...both! <img src="/images/graemlins/wink.gif" alt="" />
Being in a little cup at the pet/fish store is a very stressful experience for bettas...they need time to settle and adjust. Offer him different foods..but make sure you take out what he doesn't eat. Make sure the temp of his water is high 70's low 80's F. and you could add some aquarium salt to his water too, that helps.
If he is kept warm and quiet for a few days with nice clean water I'm sure he'll do fine. But do keep an eye out for any illness that may crop up...fungus, ick ...fun stuff like that.. :rolleyes: There are plenty of threads here with lots of good advice if he does show any signs of illness. There are also plenty of folks here who would be happy to answer any questions you may have! <img src="/images/graemlins/laugh.gif" alt="" />
Let us know how your little guy is doing !
Emg <img src="/images/graemlins/cool.gif" alt="" />