Dpup is a 14 month old Toller, normally full of energy. Two weeks ago he had what we thought was a stomach upset - loose stools, very lethargic. After a few days I took him to the vet who couldn't find anything aringly obvious but took blood test and gave him pain killers. He's a bit better but still lethargic - is happy enough on his morning walk but that seems to wipe him out for the rest of the day. Went back to the vet today - he's got a fever and on examination his hips were painful but he's not limping. He's on antibiotics and will be seen again on Friday. Is there anything in particular I should be asking to be checked?