[QUOTE= But I've noticed a lot of odd things this frog does. At times it will bloat up and slightly hunch with its mouth opened as if it was trying to regurgitate it's food. Wailing its leg across its body. But nothing ever happens. I don't know if this is some form of digestion? [/QUOTE]

Shedding skin? Generally starts from the back, over head and into mouth where the shed skin is eaten.