The only issue my dog has with it is the crackling noise coming from the inside. She thinks something is wrong with it. Once I took that out she has been fine. I purchased this because at 7 months old she slipped on some wet snow and hurt her two back legs. She just turned a year but she is still a little bit young to operate on her. 

We rescued her from the Humane Society and it’s been an adventure of a day full of fun.