I have a fire-bellied toad who is a about 9 years old. Recently, he has been very dark and is held up in a dry corner of his aquarium. He has not eaten in days and doesn’t move much at all. I think he might be shedding (in fact there is some old skin I removed from the water) but this recent behavoir is strange. To top it off, he has dry skin on his back and seems to be slightly swollen. He also seems to be gagging and he is stretching his legs out in really weird positions. PLEASE HELP!!! ;(