Just an FYI, I read through some of the comments because I'm bored, and found a post from the owners that stated the hedgie runs on the wheel, and they let him swim often for excercise, because a prescription food he is on, that he has to eat because of bladder issues, is higher in fat content than they would normally feed a hedgehog, but he has to stay on that food because of other health issues. She said he also looks fatter in the water than he is because the fat is all floating up around him.
Thought you guys might like to know that she is aware of him being severely overweight.
Cavalier likes to float upside down like this. He is definitely a fluffier hog but not over weight. I think however that the floating helps relieve the weight off the joints. My smaller hogs have never liked floating.