I saw something similar between a presa canario and a boxer. Belonged to the cousin of the same ex, that boxer was a fighty, always getting into fights, little shit and tried that with the 9 month old presa, lol. You know those moments in dragonball z when a strong fighter goes against an impossibly strong guy and they get grabbed by the throat and immediately immobilized? Same thing but with dogs, lol. Dogs that big have to be respected for what they are, it's not stupid to be prepared just in case.