sudden

I have a 1 1/2 year old lab/retriever mix. I thought she was house trained but all of the sudden she has started pooping in my basement. It is always the same spot, sometimes more than 1 time a day. It is not that she isn't being let out enough, because she has done it 5 minutes after coming in...

Thank you to anyone reading and I appreciate all help or suggestions. We had a 15 month old female lurcher, much loved and adored, who yesterday died. I was hoping by describing this sequence of events someone out there would be able to point me to a possible cause. She was in general good...