When someone first mentioned doggie life jackets to me, I'll admit, I giggled. Dogs can swim just fine, for goodness sake. But then I started thinking about it. Actually, I've known some awful canine swimmers. F.B., my sister's Hound-mix, was one of those dogs. When I was a teenager, I used to take F.B. and my dog (F.B.'s son) to the Yuba River.