- He's distracted by cats chasing his mouse.

- SIT and STAY were hard enough;
    CUT and PASTE are out of the question.

- Saliva-coated disks and CDs refuse to work.

- Three words: carpal paw syndrome.

- Involuntary tail wagging is a dead give-away that
    he's browsing www.purina.com instead of working.

- The fire hydrant icon is simply too frustrating.

- He can't help attacking the screen when he hears
    "You've Got Mail".

- It's too messy to "mark" every Web site he visits.

- The FETCH command isn't available on all platforms.

- He can't stick his head out of Windows 8.