Why did the dog have a gleam in his eye?

Someone bumped his elbow while he was brushing his teeth.

Why did the dog go to the doctor after a tomato fell on his head?

The tomato was in a can.

Why did the dog mistake the dog catcher for a grape?

He was colour-blind.

Why did the dog jump into the sea?

He wanted to chase the catfish!

Why did the dog say he was an actor?

His leg was in a cast.

Why did the dog run in circles?

He was a watchdog and needed winding.

Why did the dog’s owner think his dog was a great mathematician?

When he asked the dog what six minus six was, the dog said nothing.