I sometimes have several age groups over here, and at that time I feel it's easier for the younger one's to swallow the crumbles. I do however prefer using the pellet's as the ant's can't carry them off as easily. Either way, any of it can also be used as wet feed for them too, as we get extreme heat in the summer over here. I do the wet feed as sort of a treat for them because they love it and it helps to keep them better hydrated.