Ooohhhh yeah. I know all about this.
A couple years ago, I rescued a dog from a puppy mill. He was a train wreck in a dog suit. At first, I crated him because that’s how I’d trained my other dog (who is a perfect angel in a dog suit), which had gone swimmingly. Only problem was, my other dog hadn’t been left to live in a crate for five years straight. This little guy was having no part of any crate.
I could put him in the crate, in the middle of the living room and stand right next to him, talking to him. He barked. He howled. He whined. He cried. He panted and finally hyperventilated. He drooled foam. He peed. He pooped. He smooshed his paws in poo and tried to claw out of the crate, smearing poo all over. Same thing if I left him – he didn’t settle down after a while. He’d howl all afternoon. (Which is a very low pitched, gravelly howl. He’s what Lou Rawls would sound like if he was a dog.)
Every day, I would come home from work, drag the crate outside, hose off all the parts, give the dog another bath, and toss all his blankies in the washer in boiling hot water with lots of bleach. Every day, he would calm down about 30 minutes after I got home and was fine.
I consulted a behaviorist who recommended Clomipromine (or Clomicalm), the only anti-anxiety, anti-depressant that the USDA has recommended for veterinary use. Accept no dogzac substitutes. The dogzac is a tool. It was paired with a behavioral modification program that I’m sorry to say I was unable to follow through with thoroughly and completely. But the drugs enabled him to calm down enough to focus on the training, which was all about gradually introducing him to being uncrated and not destroying the place.
We’re still working on housebreaking, and may never master it completely because he does not have the same instinct for aversion to living near poo that most dogs have. He was forced to live in his own filth for most of his life and he couldn’t do anything about it, so it just doesn’t bother him.
I found that allowing him to sleep on the bed with the rest of the “pack” did him worlds of good in terms of feeling secure about a position in the pack. I had no issues introducing him with the cat because he viewed the cat as part of the pack as well. He’s now fairly well socialized and is left uncrated while I’m away from the house. He does have his accidents and you can’t leave paper lying around so the place is always puppy proofed, but he doesn’t bark and howl and freak out all day long either. This is also helped by my angel dog and her constant licking of rescued dog’s head. Nothing settles him down faster than a good head licking.
My point of this long and arduous post is to let you know that your mileage may vary. Not all cases of anxiety are the same and different things will work with different dogs. The key here is patience and try for as much understanding of pack mentality and how dogs think as possible. Try to find a good behaviorist, or at least a vet who is good with canine behavioral issues. You might also contact rescue organizations in your area as I’m sure they are well versed in what I’m told is common behavior among rescues, particularly puppy mill dogs where overcrating and negligence are prevalent.
Good luck. I found that, somewhere around 3-4 months, I wanted to cook him and eat him. Just about that time, he made a breakthrough and things got a lot better and he started learning a lot of things very quickly. He was only on the drugs for maybe 4-6 months (They are very expensive.) and then we weaned him off, continuing training. Hang in there.