This is what I'm thinking, and it was the same way with all five that I bought.
The rats had some kind of dirt or droppings in their fur and had stiff tails. I'm hoping that it wasn't bad quality that is deterring my baby from eating.
I am worried because shipping in the proper size rodent is expensive and risky as I'm not quite sure what he needs/ will be needing right yet until I have his feeding habits established and put some meat on his bones. CJ's has good reviews and the rodents I bought just a few days prior were not stiff or dirty in any way. It's confusing and I'd love to hear what you have to share.
btw: he's onto mouse number two if anyones following. I figure the more information available the better advice/ care he'll receive.