Linda and carpets

The dog is not housetrained. Not at all. I take her for a long, long walk a few hours after eating and she doesn't eliminate anything outside. Then we walk into the house, I let her out of sight for a second and she goes on the only carpet we haven't rolled up! Aargh!
I haven't been able to catch her in the act even once and I know each time she eliminates in the house, she's training herself to go again in the house.

She is so cute though - and here you can see the picture I took when DH met Linda for the first time when Y, N and I brought her home. (Note carpet on floor. Has been removed.)