It's not surprising that cat owners have better penmanship than dog owners.
We have 6 cats. Cat / keyboard encounters are not uncommon and have resulted in some interesting emails and chats. Several of them think that pens and pencils are toys that must be swatted at when in use so there are usually interesting squiggles on cards and grocery lists. One of the cats likes to jump (at high velocity) onto paper to see if he can slide.
November 20, 2013