Or, worse still, wind itself around the little rollers that the mouse-ball turns.
Solution - buy an optical mouse (or sell the dog!)
Have you noticed how difficult it's become to dismantle the keyboard to clean out all the crumbs, staples, spilt tea/coffee, etc.? Then playing Scrabble with the keys when trying to put them all back where they came from by memory?
QWERTY be damned!! What was wrong with good old ABC???
GG
"The Gods made Heavy Metal"