Barking Dog

A dog who was normally quiet began barking every night at around 3 a.m.
Irritated and sleepy, the dog's owner searched the back yard for what
might have disturbed this otherwise peaceful animal.

For three days he found nothing amiss. When the dog woke up the
neighborhood a fourth night at 3 a.m. with frantic barking the owner
finally sneaked around the house through the alley only to discover his
neighbor throwing pebbles over the fence at the dog.

The owner demanded to know what he was doing.

"My mother-in-law is visiting," the embarrassed neighbor explained. "If
she gets woken up in the middle of the night one more time she says
she'll leave."