I've had this baby toad for a few months now, and never had any problems with it. Recently I noticed that it had not defecated in awhile. Now it's is somewhat swollen. Not so much its entire body, but its neck and near its back legs. It has trouble moving its back legs properly, and sometimes they don't even touch the ground while it rests. It also has not been hopping around at all.
It seems like he is compacted (if that is what you call it), but I don't know what caused it, or how it can be fixed. It could not have eaten any substrate or anything, because I've been keeping it on a moist paper towel (half the cage with it, and half without incase it doesn't want to be too wet). Other then that, the only thing that has been in the cage is crickets. Any help would be greatly appreciated.

