I once had a pit bull that I raised from puppy hood. We had 5 kids still living at home at the time, as I recall.
Bruno was a great family dog-—until the day he went a little bezerk, and would have attacked one of our kids if I hadn’t been there to stop him.
I don’t know what, if anything, caused him to become vicious, but when he showed that bad behavior, I had him put down. The vet told me that he had become too protective of me, for whatever reason.
Hypothryoidism is now pandemic in all breeds and the hallmark symptom is “snapping”.
Odin “snapped” right after his first birthday.
A couple hours later, we were at the vet, getting a thyroid panel done.
It came back very low.
He has taken Soloxine twice a day since the results came back.
Tick borne diseases also cause sudden, drastic aggression in formerly placid dogs.
So can pain, which dogs are excellent at hiding until it becomes too much.
Always get the dog checked before you do anything irreversible.
Imagine how you’d feel if you knew your poor, loving, loyal dog was -ill- and you killed him for it.
I cannot imagine a bigger betrayal than that.
Any vet who told you that, *without* giving the dog a *full* checkup, including a complete blood panel, is a worthless quack.