A woman walks in to the vets with her dead parrot...

'Please help me there's something wrong with my parrot' she tells him.
The vet takes one look at says 'i believe he's dead.'
The woman refuses to believe it and demands that he does something so the vet says 'Okay mam i'll go and get my magic labrador'. The vet then returns to the room with the labrador who looks at the parrot has a sniff and turns to look at the vet and shakes his head. 'Mam, my magic labrador has told me your parrots dead.
'No no no' she replies 'there must be something else you can do!'
The vet then goes in to the other room and comes back with a cat, 'this here is a magic cat, he'll tell me if your parrots dead or not.' The cat takes one look and turns to the vet and shakes his head. 'im sorry mam he's dead!'
At this point the woman cant take it anymore and storms out the vets crying her eyes out before she's stopped by the receptionist, 'Hey where do you think your going you havent paid yet'.
'Well how much will it be?' Says the woman crying
'£500' replies the receptionist
'£500!!!! what for!!!!'
'Well mam you had a lab-report and a cat-scan'