Squishy like all water filled is usually a sign of toxing out. When the frogs are toxing out they will take on more water in a bid to flush out thier system resulting in a sort of squishy feeling. From what the text described, Its sounds like the frog is puffing itself up full of air which is common for them to do. For some reason i am unable to view the pictures, and only had the text to go off of.