I'm so sorry this happened to you! I would bet that him choking triggered the seizures. My Lulu Mae had a day of seizures back in April. It started with a big one in the middle of the night, and then she had smaller ones all day until about 7 pm. After they ruled out all other physical causes and I knew she hadn't eaten anything bad, the vet was almost certain that her sleep apnea triggered it. The vet said that lack of oxygen will cause seizures, so that would probably explain the big one. Then she said it takes at least 24 hours for the brain to clam down, so expect little ones all day, and that is exactly what happened. Lulu has had palate surgery, but her sleep apnea is still bad when she is in a deep sleep. She sleeps with us, so there are many times I push her in the middle of the night when I don't hear snoring. So far, she has been seizure free since then. Hopefully, your little guy is the same way and the seizures will calm down now. Him puking up some of the gunk would hopefully be a good thing, too. Don't panic if he doesn't act like himself for few days. I was so worried that Lulu had brain damage because she seemed "zoned out" for the day or two after and not very responsive, but then her personality came back. I hope your guy feels much better soon!