if the leg looks weird u need to post Picts of that. Sometimes they are just freiked out being in a new environment, and in a home. Try a drop of honey per ounce of warm(75) water in the communal bowl, put him in there at lights out. See if that perks him up a bit. Honey is anibacterial and just soothing to nerves. Honey is fine for both the frogs, maybe it will give your other obe a sugar rush and he'll bounce around for you. Give him some vitamin and calcium dusted crickets and see if he eats. If they're bigger frogs 2-3 inch, they may have been under nourished at pet store and have a start of a Bone disease. Could be he's just been in a little cage for too long and has to build up his muscle.