We were a dog family for my first 6 or 7 years of my life, and I got to experience the dog having a litter or two and finding homes for the puppies. Eventually, following many childhood colds, the family doctor determined that I had allergies that were aggravated by the fur or the dander, and we reluctantly gave up having dogs. But that did the trick. The constant allergy problems disappeared.
That was in Columbus. Several years later in Florida we were offered a nice dog and we decided to give it a try again. There was little or no problem, likely due to the climate and to the windows being open practically all the time before everyone had A/C. So that one dog was a success.
It was many years till I had another pet. When I moved here in 1989 I'd been around a number of cats. At that point I would have had no interest in having a dog, even though I like dogs, and I became interested in raising a couple of kittens on my own. That's when I went to North Shore Animal League and adopted Muffin and Taffy. That was in 1990 and the rest is history.
And as it turns out, those allergies are pretty much a thing of the past, at least as far as our own cats are concerned. I do have allergy issues now and then, but only of the seasonal weather type.