Left to get DH from work and run a couple of errands, I had 3 healthy pups. Came home and Sneakers was not his usual exuberant self. He was not trying to help open the crate door, nor was he in a hurry to get out. When the pups came back in from potting he cried out when he went to lay down. I checked him over and didn't see anything. Checked his crate and noticed he didn't eat all the goodies in his Kong. He was very restless and couldn't get comfortable.
Of course our vet was closed, so off to the Referral Clinic. The vet there checked him over and found an area on his back that was very painful. So he is on "bed rest" for 4 weeks pain meds and muscle relaxant (fortunately I already have Tramadol at home). They said I could wait and have my regular vet do xrays so I will call on Monday. Hopefully it's something simple like he just pulled a muscle.