He should be fine

! When I first got my Toad he ate like crazy! I guess after he realized food was in abundance, he slowed down eating. I bought my toad at a reptile show so I'm just guessing the vendor fed him; just not nearly as much as I do. However, you received your toad from the cold wild. Its kinda like when I was a kid and caught a tree frog. At first the tree frog ate like a starved child, but after a few weeks he realized food was in abundance and slowed down.
He doesn't eat nearly as much, but hasn't lost much weight. His favorite thing to do is bask under his lamp in his water dish.