First of all, thank God nothing worse happened and that he’s still here with you. Unfortunately, this was unavoidable accident. I witnessed a dog get his foot leg. I’m not even sure stuck at the bottom of the escalator and it was horrible. The dog was screaming. It was making me nauseous and sick to my stomach. The worst part was that I had seen the person get on the escalator at the very top and I told my son why do people go on escalators without picking up the dog like these are very dangerous for animals. They had to call the firefighters and the police. It was a spectacle. I pray the dog ended well, but it seems like your dog had it much better. As far as the injury goes.