Yup! After four hours of searching in the caves, I asked on the forum and in five minutes I had the little guy! I'm going to breed it when it's old enough with the electric dragon, get a thunder egg and then trade it for a magma to a friend of mine, and then do the same with the magna and ember dragon and trade it to another friend for ice. Cause I just cannot get them in the cave quick enough when they come up

Edit: I need my horse dragon to be female