Luna is now about 18 weeks and has been very well house trained for about 3 weeks with consistent dry and clean nights for about 8 hours. This morning I came downstairs to a poo on the floor and have just found a puddle in the living room. The living room door to the garden has been open so she is free to wander in and out of the garden. I think I might have read something somewhere about house training regression ... Am I imagining things?