It sounds kinda gross, I know. And I will admit - sometimes it IS gross. Our dogs pee inside. Not all the time, of course. They go outside when weather permits, go on walks, etc. But for the most part, when you own a 4lb dog in a ridiculous climate like ours, you don't venture out in the winter too often. It ain't good. And they don't even like it! Actually - go figure. The puppy mill dog who lived in a cage likes going out in the cold more than the pampered purebred. She's a tough ol' broad that one.
Our dogs have been trained on puppy pads forever. But recently, I made the switch to this thing called The Pup Head. It's indoor synthetic dog grass with a pee collection tray (like what they pass around at the end of a church service). Looks better, is more environmentally friendly (than buying pads all the time), easy to clean...and actually works! They took to it really fast.
And you don't gots to mow it.
I am a fan.
Stick that in your litterbox and chew it.