Kids love animals. My children are fortunate to live in a family that has two dogs and four hermit crabs. We have also temporarily cared for a variety of lizards, snakes, frogs, caterpillars, and such. We are definitely animal-friendly at our house.
And yet my kids want more. They continually ask for more pets of different kinds. Birds, lizards, fish, mice, anything. Instead of being content with our current critters, my children yearn for more.