A client brought a litter of golden retriever puppies to my veterinary
clinic for inoculations and worming. As the look-alike pups squirmed
over and under one another in their box, I realized it would be difficult
to tell the treated ones from the rest. I turned on the water faucet,
wet my fingers, and moistened each dog's head when I had finished.
 
After the fourth puppy, I noticed my hitherto talkative client had
grown silent. As I sprinkled the last pup's head, the woman leaned
forward and whispered, "I didn't know they had to be baptized."