My Mom and Dad raised "Old English Bull Dogs: just a few litters and family get a dog.
My dog was the best,

I remember when a woman friend and me went up the hill behind the family home. I wanted her to see the old swimming hole we went to as children.
Dang, it was a big beautiful lake!
Well, we were hot and I throw my Bull Dog off the short cliff (English, Remember?). Damn good thing she knew how to hold her breath!

Damn dog sunk like a rock! Woman was freaking out!
I dove in and got my dog. They are very smart (She held her breath), but, I not think English Bull Dogs are the best swimmers. At least "MINE" was not. But, they do love water.