What is a dog who crosses the street twice in an hour?
A double crosser.

How do you feel if you cross a sheepdog with a melon ?
Melon-collie !

What do you get if you cross a dog with Concorde ?
A jet setter !

What do you get if you cross a giraffe with a dog ?
An animal that barks at low flying aircraft !

What do you get if you cross a sheepdog with a jelly ?
The collie wobbles !

What do you get if you cross a dog with a blind mole ?
A dog that keeps barking up the wrong tree !

What do you get if you cross a dog and a cheetah ?
A dog that chases cars - and catches them!

What do you get if you cross a Rottweiller and a hyena ?
I don't know but I'll join in if it laughs !

What do you get if you cross a sheepdog with a rose?
A collie-flower !

What do you get when you cross a bulldog with a sheepdog?
A wool dog that shrinks when wet!

What do you get when you cross a Doberman with a bird?
A Doberman fincher!