Here is a suggestion, my puppy is outside trained and has been for quite a while, with the upcomming winter I decided to purchase this since it is similar to outside... We have very very cold winters here and often get up to 18 inches of snow... I thought this would be a great alternitive since it at least " looks" like the grass outside?? It hasnt come yet Im hoping it will be better then pee pads since she has no idea what they are anymore.. while I was training her outside the trainer told me pick one or the other, she is only a puppy and you dont want to confuse her so she hasnt seen a pee pad in forever.. I went to my friends house she has a Chi and Laci went right over and peed on it !!
https://www.buybackyardbuddy.com/?MID=598178