Hi, can anyone tell me why my 3 month old female cavalier comes inside a pees on her crate mattress or couch/bed in the lounge or her playpen mattress they are all different mattresses and different fillings. When she pees outside she is very private, hides in the shrubs and even when playing she will run off in the bush to do her business. When she is in the house it’s like she deliberately pees her mattress not just one but all of them. I am constantly washing mattresses I have tried putting a blanket down in the mattress to soak up the pee and make it easier for washing but she just goes crazy digging the blanket until it’s off, once off she pees. I take her out before she can do it, but soon as she’s back inside yep she’ll pee on it