re: Elderly dog barking at night, pacing, and seeming restless - any pet owners with advice?

She probably needs to use the restroom. As she has gotten older her bladder isn’t as strong. She is trying to let you know to take her out, that she can’t hold it. Dogs that are trained hate to disappoint their owners, especially by peeing in the house. Our 13 year old dog started doing it also periodically. When she does it, we get up, bring her outside and let her pee. She comes back in and goes straight back to sleep.
Just like a little old elderly person, she just doesn’t have depends for her incontinence.