i have a 3 year old German Sheppard bitch, that I have had since a pup. she is house trained but she keeps going to the toilet at night it doesnt matter when we feed when we walk her or let her out. it started when we gave her the run of the house so we now put her in the down stairs loo thinking it was to do with her being crate trained. but she even does in there. can you give me any ideas of what I do ?