In my case it's cats. My kids always try to bring them in. One night on my paper route a small black kitten crawled out of a ditch just as I walked up to the house to throw the paper on the porch. Two days later after an arm full of scratches, stuff on the carpet, and fleas in my kids' beds, the kitten was returned. My nine,six, and two year old learned their dad just isn't a cat person even for a short time.