@Rebecca thank you is your dog in a crate over night or just in their bed
We use a crate x
Some nights I go up about 7pm if my baby is overtired and restless but I have a toddler so usually up about 7am so longest the dog is alone is about 12 hours, he sleeps in a bed in the kitchen
I go up around 10 and try and get baby down by 11 (EBF), our dog does 10-8 overnight