I hope i am posting this correctly... !
I am not very good with message board
Yes my little love buddie was neutered and we tried the citronella bottle around his neck but it was too big to spray correctly.
I used to keep his coat long so the water bottle kept matting his hair... now I keep him in a puppy cut so maybe the water bottle would work for the barking.
I have tried spraying vinegar on the mattress but it never help.