I usually try to do everything I can to stay away from threads like this..... I've lost babies to different reasons, and their tales are different, and heart wrenching. You made a very difficult decision, one your having a tough time dealing with, Thats understanable. I'm truly sorry for your loss of Tyson. I had a cocker, which was a senior, She had seizures, she lost control of her bowels, she also lost her eyesight. Thinking back, that was her quality of life, but I did everything I could to give her another shot, spent money hand over fist trying to save her, and in the end, I prolonged her agony, although I was with her every minute, or my daughter was, She had no quality of life. She had a heart valve problem, which was being treated, and the medication she was on triggered the seizures, so this isn't going to help you mush. After the first seizure, and rushing her to the vet, we changed medicines for her heart, and also treated her for seizures. Not of which is helpful information for you Tyson Baby. The helpful information I have for you is this, I drug an enevitable situation out for a year and a half, to save my baby, But what I found in the end was I couldn't let go. When I lost her, I was in shambles. I did everything I could, to give her a better home, She was a breeder living in a kennel at a puppy mill, The breeder was getting ready to put her down, because she wasn't producing puppies, That sparked a connection between us. In the end, my inability to make the decision you made is as Texas Carol just said, was Greedy. I find myself getting home from work, Both my Bullys are crate trained for their safety, when I'm at work. I walk through the front door, and sometimes Rambo will do the backward sneezing, I run to him, and get him from his crate, and hold him, while he licks me all over my face, and the backwards sneezing stops. When Rambo gets excited, I mean very excited, he starts backwards sneezing really bad. When this happens, I really worry, and even though I keep my thermostat set at 70, When I put my chin over the top of his head to hold him close, I can feel he's warm. He does cool down after this. I never have any issue with Rocky. Rocky is just as his name implies, a Rock!! I'm sure i've just rambled to make a couple of points, But I agree with Texas Carol, in that you did the right thing! The further expense of finding out exactly what caused the seizured from a Vet, is much like kicking a dead horse. I would allow yourself some quiet time, and space, as time heals, Your in all of our thoughts and prayers. I dont think anyone here will be able to answer your question about the seizures, I'm not sure where you got Tyson from, But his lineage is where I would start my research, if you still feel motivated to do so. Our hearts truly go out to you and Tyson. And as I said, I find it incredibly hard to post on this thread, having gone through this over the years, different senerios, with different breeds. I'm personally asking you to reflect back on the good and happy times with Tyson, and not the last day(s) as hindsight is 20/20.