House trained dog pooping in specific room suddenly.
I have a 16 month old terrier mix, who has gotten herself banished from several rooms in the house, for pooping in them. For example, she used to poop in the baby room any time I was in there. Not because she needed attention, but I am assuming because she smelled the diapers in the diaper genie, and drew the conclusion, "I smell poop here, so it must be ok to poop here" since I could only remove the smell that humans are sensitive to, I was forced to prevent her from ever going into that room with me. Which resolved that problem. She has had an accident or two along the way, which she was not punished for, accidents happen. But this past week she has decided that it would be a good idea to poop in the spare bedroom. We use that room mainly for storage, and I have to keep the door open, so the temperature in the house stays the same all the way through. I am a stay at home mom, so she gets to go out anytime she needs during the day, but last night when I was getting ready for bed, I heard crunching that I should not have heard, I still don't know what she was chewing on in that room, but as soon as she heard me headed her direction, she ran back to her bed, as though she had done something bad. What I found was a nice fresh poo and pee spot, I had taken her out less than an hour before. This isn't the first time she has done this either.
There have not been any major changes lately,
It wasn't a cry for attention, otherwise she would have done in front of me, instead of a place I wouldn't find it right away.
She is in perfect health, and there have been no changes to her diet.
She has canine separation anxiety, which is why she has to be put in her crate any time we leave. We had to use a no-bark collar for a long time with her to get her to keep from disturbing the neighbors while we were away. She has learned the kennel time is quiet time though.
What can I do to figure out why she has suddenly decided to secretly poop in the spare room, when everyone is home? And what can I do to fix it? I want to nip this in the bud early, so we don't completely lose all of our house training.