I'm fine with the child and dog being considered unequal, but why isn't one a subset of the other? It could be: cruel to euthanize either It could be: cruel t

I'm fine with the child and dog being considered unequal, but why isn't one a subset of the other? It could be: cruel to euthanize either It could be: cruel to let either one suffer an agonizing life It could be: cruel to euthanize a child, but do whatever you want with the dog It could be: cruel to let the suffering dog live, but do whatever you want with the child It could be: do whatever you want with either It's none of those. Why? If I can (and must) keep my child alive despite an agonizing and fatal illness, why can't I do the same for a dog? Why do I risk going to prison just for treating a dog like a child? Why am I required to have the dog killed?