I’m sure that my understanding of reincarnation is deeply flawed, but one thing that I’ve always heard about it is that if you are bad in one life, you’ll get turned into a lesser being. Ergo, a human who is bad will get turned into a dog.
I have a number of questions about this. First of all, what is the criteria for being reincarnated from a dog back into a human? Do dogs have the capacity to be morally good or bad? Secondly, a dog really doesn’t seem like that bad a thing to turn into. Like humans, some dogs have bad lives, but a lot of dogs have really good lives!