We have two cats with our bulldog pup...so far cats are winning.
My oldest daughter’s ancient mini Dobie scares the beegeezuss out of said Bulldog.
Pitbulls do have to be watched around other dogs unless it’s make female and even then maybe....and that is probably true with any catch dog.
One of the Rules of Ownership I got drilled into me is “Never trust your pit not to fight”.
He’s always supervised, and I seperate them when we leave the house, even though he’s never given me any worry aout the chihuahua.
They remind me of a rhino and a tick-tick bird; brawn and brains. They’re good dogs.