I'll offer my gray's roaches each day and if they don't take it I'll try the next day. I feed only from tongs with the frogs so I know for sure who is eating how much. I've had them go off food for 4 days this past winter. As long as they aren't skinny, acting normal, and what is going in is coming out, I wouldn't worry about him. As for the toads, my female has turned into an eating machine. She will eat anything she can get in her mouth, my male isn't as big an eater, but he still has a nice belly on him.