This sounds like the exact same symptoms my Alfie has , he has had quite a few seizures now , each time with the stiff front legs , sometimes he drools as well and is very tired after them. Like you at first I thought he had slipped or something . He has had blood test at the vets and nothing shows up , he does not want to put him on any kind of medication just now as the fits are coming about every 6 weeks or so. I have thought of everything Iam giving him, like food , frontline etc I even changed what I use to clean my floors.Sorry I dont have any answers but I know exactly how you feel.
