My little woodfrog tads are mostlikely along the same lines as yours. they've absorbed the feathery little gills, lengthened out and became more rounded in body with tailfins atop and below. they are ravenously feeding off fish flakes. i put new water in their tank every day, leaving the tank half full, draining out about half of that and replacing it with fresh spring water from our tap.cant wait to have 50 little wood frogs! i only had one death out of about 50 tads.