I thought the cat was going to die as it lay there shaking and foaming at the mouth not far from my radiant heater where it likes to sleep

Today is a normal day more or less. My friends will be at the beach later playing ball and I may join them around 5pm when it cools down a bit. It will be summer in about two more weeks and the temps are getting up there, along with the sun’s intensity. Well, life just threw me a curveball just now as my cat just had some type of seizure. It was sleeping and then started making crazy sounds and shaking a lot while on its side. It was foaming at the mouth next to the air purifier and I had no clue what to do with it. I just tried to calm it down but it was a very odd experience. My HVAC expert friend may know what happened as she has three cats at the local business where she works. Maybe I can google it and see why it happened and what to do next time. The local contractor near me deals with animals a lot in their air conditioned store and I could go there and talk with them about it. I thought the cat was going to die as it lay there shaking and foaming at the mouth not far from my radiant heater where it likes to sleep. Her brother would have been so sad losing his sister though, but it looks like she is going to be okay now. Maybe my fireplace was dirty and the cat walked in it and got something on its feet, or it could be the oil heater was leaking and it ate some oil but I have no clue. So much for my normal day!
Air quality systems