He's not himself. Got him up at 8 as normal but he didn't dash straight down to the run for food. He just lay about, head down, eyes closed ish. Not him at all. Had him at the vets by 9am. She gave him a good check over, tummy, teeth, ears etc. She could find nothing wrong at all. So she's given him an anti-inflammatory injection, some gut stimulant and some syrup food. Now he's home but just looking extremely sorry for himself in his hutch with Dumpling fussing and cleaning him up. So worried. What can I do for him?