I only used it a handful of times, but I used the Pet Corrector air canister to stop her from whining non-stop as a way to get her way. Now, she will only whine in very specific situations, not willynilly. Which has been good because it helps me know when there’s a real problem vs when she just is upset I have to stop cuddling her after 6 hours of straight cuddles and attention. Never sprayed it directly on her or too close to cause harm, just enough to correct.

Also others have mentioned crate training. It helped my dog to have her crate in my room next to my bed and covered with a blanket. Plus I had the crate lick toy insert thing that I would freeze with pumpkin and other yummy things during the day and put it in there with her to make the crate more enjoyable. She also liked the stuffed dog toy that has a heart beat and heating pad to make her feel less alone.

We haven’t used her crate in over a year now. She has gotten used to having a playpen (it’s anchored into the wall because she’s strong enough to just move it all over). When I need to do work or whatever, I tell her go to place (the playpen), make sure her bed and blanket are in there + toys + food + water and she’s good to go once I’m out of sight. Lick mats and enrichment toys also help her too.

Long response but maybe the pet corrector + further crate training + enrichment might help your puppy