she’s the right age for teething, which is when puppies’ gums are sore and eating can be painful. this is also the age both of my puppies went through a stage where they didn’t want to eat anything, so i would use that as an opportunity for training. i would put the bowl down and leave it for 15 minutes, and if she doesn’t touch the bowl, pick it back up. i would use her kibble as training treats so she’s working for it – you should be working on basic obedience right now, anyway, so it’s an ideal opportunity for that.
once she has all her adult teeth in, she should go back to eating normally.
i would keep things she shouldn’t eat out of her reach.
Try diapers for one. For two give that dog as much attention you can when your home. Do not give up.
I didn’t read back so I don’t have all the details, but I’ll bet your dog is terrified and looking to you to fix it. Is she in pain? Dogs absolutely do communicate with us. If I told you some of what my dogs do you’d be convinced. All animals communicate with people but you have to “listen”. Her barking and howling and having to soil her crate have her totally stressed and frightened, Her whole life has changed. Your vet should be giving her something for anxiety. Same as with people…stress is a killer. Her howling is a cry for help. How can you ignore that?