Our 15 month old dog (Maltese / Yorkie mix) is pad-trained and has been gated to an area in the downstairs of our house. Prior to the last week, she was 100% at either using her pad or going outside. She recently started jumping the gate, and we decided to take it down so she would not get stuck on the other side. Now, when she comes upstairs, she is often pooping or peeing on the carpet. Any suggestions?