What can I put on my garage floor that will stop my dogs from peeing on it ? read:?

My dogs have pet doors that to into the garage and then into the fenced back yard. Now that the weather is cooler, they are peeing on the garage floor.WHAT CAN I SPRAY OR PUT ON THE GARAGE FLOOR THAT SMELLS BAD ENOUGH , THEY WILL LEAVE IT ALONE. I have used moth before, but I am afraid one of my kittens might eat it Yes, they have had obedience cles but I need an easy way to deter them, I have health issues of my own and don't need to be following them around to catch them and discipline them