An Ozzie sheep farmer takes his dog to the local vet and tells him that the dog has no energy.
"Just lies around and has been doing nothing for a couple of days" he says.
The vet looks at the dog and says "that's a bit strange" then he disappears out the back of the clinic.
He's back within a minute holding a cat and says to the farmer "we'll see if this get's a response" and he waves the cat around the dog's head three times.
No response.
"Mmmmm that's real strange" says the vet so he takes a blood sample and disappears out the back again.
He returns afer a couple of minutes with the news that the dog has been bitten by a spider but will make a full recovery after a dose of antibiotics which he gets from a cabinet on the other side of the room.
"That will be $1,000" says the vet.
"Gee" says the farmer "thats a bit rich for a couple of pills doc".
"Not at all" says the vet. "$50 for the consultation, $50 for the pills and $900 for the cat scan"!

Cheers,
Boof.