We have just the five horses---the sorrel Ryssa, the buckskin Shiloh, the brown Nikki, the bay Casey, and the strawberry roan, Abby. The pinto in one of the shots isn't ours...he's a boarder like Casey living at that neighbor's. I don't actually know who owns him, but it sure isn't us.
My mom and I are essentially responsible for all the pets. At 19, I am the youngest child (out of two) of the family, so there are no little kids or babies to chase around the house and worry about with the animals (unless you count my mother's grandchild, but he's only over once a week). The cats are primarily my responsibility, since one of them is TRULY mine (Kit) and the others just follow me around like they are mine (I have an entourage, it's wonderful). The dog is my mother's. The horses are a shared responsibility between my mom and I, though my dad will take care of them if either of us can't. All of the fish are mine (though I'm giving one of my Betta fry to my mother shortly). The hamster is mine. The gecko, newts, toads, frogs, snails, etc. are mine. Ryssa (the sorrel mare) is mine, but her care is in the hands of both of us since the other four horses are my mother's.