Bless your poor baby and you for having to listen to and watch him struggle for air! I watched his first video and it broke my heart. He sounds like he has something hung in his throat and it is choking him! Surely all of the endoscopies would have shown that though. Gosh, I know you must be so very frustrated!!!

BIG HUGS and prayers that a vet is soon able to get this figured out!

Kim