You remind me of a dog

My colleague Ian is having a tough time with one of the builders on his site. Today they had the following conversation.

Builder: You remind me of a dog I used to have.
Ian: oh yeah? Why?
Builder: Always on at me, never leaving me alone, worry worry worry worry
Ian: I see. And what happened to the dog? Have you still got it?
Builder: I shot it.
Ian: Oh.