One hot summer day, a Newfie came to town with his dog, tied it under the shade of a tree, and headed into the bar for a cold one.
Twenty minutes later, a policeman entered the bar and asked, 'Who owns the dog tied under that tree outside?'

The Newfie said it was his.
'Your dog seems to be in heat' the officer said.

The Newfie replied, 'No way. She's cool 'cause she's tied up under that shade tree.
The policeman said, 'No! You don't understand. Your dog needs to be bred.'

'No way,' said the Newfie. 'That dog don't need bread. She ain't hungry cause I fed her this mornin'.'

The exasperated policeman said, 'NO! You don't understand; your dog wants to have sex!'

The Newfie looks at the cop, measures him up and down for a few seconds and then says, 'Well...ok, go ahead. I always wanted a police dog.'