Hi there
I had this same problem. We recently moved to a townhouse and w/ Meka not fully potty trained her new room was the washroom downstairs. Plenty of room for her and all her stuff...but every morning between the hours of 4 to 6 am, she would bark... I too would try to let her "bark it out", but there were times that I had to tell her NO firmly (from the top of the stairs) and she'd stop. However, she's 10 mo's now and doing so well with obidience/potty training that we've been letting her sleep upstairs with us (in her bed). And of course, that got rid of the a.m. barking. I think they get a little loney being away from us so, it could take him some getting use to. Something that use to help me when putting her to sleep, was telling her it was NIGHT NIGHT TIME and turning on her night light (lol...i know, i know) but, she understood - really
Oh, and a very BIG Welcome to YT
Not the expert, but feel free to PM me with questions or just to brag on your lil one...