One of my shelter dogs was allergic to fleas. The vet gave me something for her without telling me that it did heart and liver damage. She died at 8 yrs old. There are quite a few factors in longevity. The vet lived. (the jerk)
Sorry that happened to your beloved dog; also saddened to hear that the vet lived.
I suspect a vet hastened my cat’s demise with flea meds too. She was already sick and 14 years old, and she could never keep another bite down after vet applied Advantage.
From now on, flea combs.