[Rusty0604]

My daughter has a bull mastiff and he is the sweetest dog I’ve ever known. He loves kittens and cats too.

[Norski]

Yes. And I hope, for the sake of you, your daughter, her cats, and everyone else around this dog, that her dog never goes “game”.

Please research the breed type and statistics, and then act accordingly.

This eight page paper may prove of interest to all:
The science of how behavior is inherited in aggressive dogs

Here is the address: https://www.scribd.com/doc/14810086/Heritability-of-Behavior-in-the-Abnormally-Aggressive-Dog-by-A-Semyonova

Thank you, Norski