Whoa. A tiny bit of TMI there...
But good for you sticking with the pup. I haven't had mine for a week yet. I love him to pieces. They can be such good friends, can't they?
You mention a "cage." I'm wondering if you mean a crate or a pen. I'm using a pen for mine (with a small crate inside) so there's room for a training pad. He's pretty good about going on the pad that way. You might try that.