Hi. My poor cat had to have a abscess drained after getting into a fight. He's now wearing a cone but while at the vets she wanted to run some blood tests and do a urine sample as he's licking his willy quite a lot and she thinks there could be another problem :( my problem is this. She has given me some crystal things to go in his litter tray and a pippette and syringe to collect a sample but he's not used to using one and hasn't been for a wee all night :/ any tips on how to get him to use the tray so I can get a sample? X