I have to agree with Brian, fruit flies then pinhead crickets until they can have bigger ones. That care sheet link he posted was an amazeing help for me. Also I started a Grey Tree Frog Group on here just for Grey owners and lovers so feel free to check that out by going to my profile and clicking the link. In the Group page theres a post of ouside Grey sites I was able to find and found helpful. Hope you join my group and post pics or your lil ones there. I keep my water level in the dish shallow as well to avoid drowning there heads are still above the water when sitting in it.