The crate may be too small as Villette pointed out. We hear that the crate should be big enough for them to stand and turn around but I feel that it's too small. I put mine in medium size crates that are for dogs about the size of a sheltie or cocker. When they got older I started putting a standard size bed pillow in them for a bed. Works great because I can put a fresh clean pillow case on it and keep everything nice for them. My dogs have free roam of the house now but I still use a crate when we have lots of company or travel. Crates are great but they can be abused as well. Just don't leave a dog in them for extended periods of time..
here's a link to a wonderful pen, I have seen them at dog shows, they are very nice..something like this might work better
http://www.roverpet.com/enclosures.htm