Well yes, just like any condition. The thing is people think because their dog cries and howls when then leave, then it's separation anx. Same if the dog is following them all over the place. Which it's not.
The panting is a dead giveaway. Dogs don't sweat, so if you see your dog panting and shaking like crazy when you come home, just picture a person shaking and sweating….you would know instantly that that person was breaking down.
Gizmo would be like that. He would be panting and shaking, whimpering and fast pacing back and forth not knowing what to do, when I entered the room after being away. He would claw and chew til his teeth bleed and paws bleed. Poop, vomit, urinate, destruction...you name it, he did it.
If you are interested then there are several good reads out on the internet to read on the subject. Books too, one that I liked, was I'll be Home Soon: How to Prevent and Treat Separation Anxiety. It's not a super book (actually it's more of a pamphlet than a book), but it does have some good general information on the condition and tips on how to battle it.
With Gizmo I had to end up using drugs. I had tried every Technique , and was getting nowhere. They helped to calm him down enough so the training took hold. But we are not 100% out of the clear yet. But it is far better now than it was in the beginning.
I have had some who will eat holes in anything left in or near the crate, just because they can, they are not overly upset at being in the crate, just will chew if given the opportunity. I have had dogs who do not chew anything in the crate, but if not watched outside the crate will chew corners off pillows and eat shoes, and then I have had others that do not chew anything. The safest route is to not put any bedding in the crate, a kong or other toy might work, but I have had nylabones demolished and ingested, so try it out in short time periods just in case. Do not feel guilty for taking away her bedding, its for her own good, you definitely don't want to deal with a blockage.
Put in a roll of paper towel. Yes, paper towel…take the plastic off first. My boy, when crated was crazy..so the breeder suggested putting that in. The dog will tear it up relieves his need to distroy won't hurt him if eaten, like blankets will...and it gives him a "nest" to sleep on when he is done with all that energy.
I did do that for him, at first, but now he has house manners, so we don't use a crate.
Have you tried a DAP? google dog appeasing phermone. i have the plug in and use it when my female comes in season. it helps with the intact male dog in the house. at any rate it cannot hurt.
While paper towels might be a choice… I would still worry about all that paper binding in the gut... have seen it happen... if you can determine that for sure it is not eaten.. that is one thing, if not... it would not be my choice. Just an opinion...
And I have to say to all with either this or crate problems, I have not had that.. but then I don't have to crate mine when not home. We have a dog room and a doggy door to the back yard. We have 12' privacy fences with padlocks on the gates... and in a pretty quiet neighborhood except for the squirrels.... so have not had to deal with what many of you have.
Put in a roll of paper towel. Yes, paper towel…take the plastic off first. My boy, when crated was crazy..so the breeder suggested putting that in. The dog will tear it up relieves his need to distroy won't hurt him if eaten, like blankets will...and it gives him a "nest" to sleep on when he is done with all that energy.
I did do that for him, at first, but now he has house manners, so we don't use a crate.
I do this with Querk….also newspaper is good. It does help 
And to add, Querk has excellent house manners, so he is rarely crated, only when we travel, or in the car, etc…so I don't have to use a roll of towels per day...that would get pretty spendy!
Newspapers have ink which can give dogs reactions… so I would be careful with newspaers.
Sharron, I have been told that most newspapers are printed with biodegradable non-toxic vegetable ink now…but regardless, he doesn't eat it.
It does sound like this person's dog is actually eating the bedding, towels, etc. because he/she is worried about the dog getting a blockage. Something that is safe to eat would be better than paper, I think, but I've given Paco Busy Bones and Kongs with treats inside, just to find when I get home that he's totally ignored them. I'll get home, open the crate, and he'll pick up the Bone or Kong and start working on it outside of the crate. I think it's his protest to being left home alone and not getting to come along more than a protest to the crate, as he never minds going in there.
To the OP, I wouldn't worry too much about your dog not having bedding - Paco shoves his bedding to one side of the crate and sleeps on the plastic bottom all the time. I don't think they mind too much, as long as they're not in there for long. Have you tried video-ing your dog after you leave, or sneaking back to the house and spying on him? I video'd Paco once and found that he pawed at the corners and sides of the crate for six minutes, then curled up and slept until I came home 4 hours later.
