I have walked around the yard several times and cannot find any piece of fencing sticking out however there are trees that grow in between the fences that are short so I am thinking he got caught up on a branch. The dog next door has gotten him before on his nose however just a little scratch. So I wouldn't put it past the dog but I cannot say for sure it was her either. Whatever happened was bad and I never want to go through this again. I keep thinking it could have been Mayson so to be safe as soon as my husband gets home we are going to start building a privacy fence on that side. Mayson is the only one that was out there and said they were running up and down the fence and once Tyson got close she bit him but he wouldn't be able to tell if he got caught up on something and just assumed it was the dog. I think it is impossible for the dog to have done this through the fence as well. Who really knows just thankful that the dog is still alive and doing well.