Two jobs

The chief constable of a small Yorkshire town was also an expert veterinary surgeon. One night the telephone rang. The chief constable’s wife answered it.
“Is Mr Blank there?” inquired an agitated voice.
“Do you want my husband in his capacity as veterinary surgeon or as chief constable?” asked the woman
“Both, madam,” came the reply. “We can’t get our bulldog to open his mouth – and there’s a burglar in it?”

— Herbert V Prochnow & Herbert V Prochnow Jr. in Jokes, Quotes & One Liners Volume 2