I'd try the Cabelas website. They have a nice selection of them.
There shouldn't be specific qualities in a dog bed other than that it should big enough for your dog, and that it is comfortable enough I guess.
On the floor in an extra-large dog bed.
First, try sitting in the dog bed and having the dog sit next to you. Show the dog the bed is OK and it is ment for them. If your dog is 'food oriented' use treats to persuade the dog to the bed and keep it there. :)
Treats. lure the dog off the bed into his bed with treats and when and if the dog gets back on your bed, scold him and put him back in his own bed and say stay. If he doesn't get back onto your bed give him a treat.
a dog
take him to the vets and get a new dog bed. simples.
There is no accurate way to answer this. First of all, you didn't mention a country or location. Second of all, it depends on the brand. And third of all it depends on the materials used to make it. Using my own currency, based on the factors above, a large dog bed could cost anything from £30 to £250.
The dog has probably buried something in it's bed and doesn't want you to find it. My dog does that quite often.
If it is a indoor dog get him/her a x-large dog bed and put it near your bedroom or even in your bedroom some sleep in the bed with you it all depends on how spoiled you want your dog.If it is a outdoor then get him/her a really good dog house and put an old blanket inside.Just remember when it is very hot or very cold the dog should come inside.
a large bed.
Couch on a dog is simply the sofa in which a dog is on it.
In a comfortable dog bed. Irecommend you bring your dog to the pet store [or were ever you're getting the bed] and let your dog pick out the bed.