My Fire stomach toad is acting funny?

he won't eat, and his back isn't as bright as all of the other toads i've see in the pet stores. he likes crickets, but sometime he spits them back out. he's really unnatural.
Answers:    could be a stress or impaction issues. can u describe it set-up.
ask it in amphibians lol it really doesn't matter what category it's in though but a toad's a amphibian not a reptile. Never intellect there is no amphibian category my bad!
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