So, the 'trap dog' Ella had a major seizure today. Turns out, we're probably dealing a genetic abnormality called MDR1 which causes dangerous and sometimes deadly reactions with certain medications. In our case, Nexguard flea/tick/worm will kill Ella. Ella seized, went completely rigid to the point of not breathing, foaming at the mouth, gnashing teeth. Was taking a nap with my wife, fell off the bed onto her head. Just bad. Is your dog susceptible, check this. Ella's ok
https://prime.vetmed.wsu.edu/2021/10/19/breeds-commonly-affected-by-mdr1-mutation/