They gave her a suppository beforehand! The vet handed a tube to the AEO and said "Put this in her back end and blow the tablet up the tube."
After much huffing and puffing, the suppository refused to move, so the vet grabbed the tube, turned it round, and blew the tablet straight in.
"Why did you turn it round?" said the AEO.
"Well I wasn't going to blow it after it had been in your mouth"!