I wasn't allergic to dogs when I was younger and developed an allergy in the past few years. It's not gonna stop me from loving up on my dogs, because they are the best little guy and girl in the world, but I do try to avoid snuggling my face into them too much and I wash my hands after I play/pet them. I've been allergic to cats most of my life though and everybody I know with a cat allergy has a fast reaction time to their dander, so that is slightly questionable.