Quoted from KozMckPinball:

I would've expected that this sort of leg help would require someone named Peg.

Quoted from Homepin:

OK - I will be shouted down here::::grammar police in full swing.....
Your sentence reads as follows:
-A friend had a cat
- I was in high school
- I had three legs
WHAT!!! maybe you're counting your 'middle leg' here?
Your sentence structure is incorrect. I would suggest you probably meant to write:
"When I was in high school, a friend of mine had a cat with three legs".
There you go, now it makes sense.........flame away people....
As to the missing leg - I would cut them some slack. It's easy to overlook something - happens to us occasionally as well, someone will call and complain that we only put 7 feet instead of 8 for the stools we include with our video tables - no biggie - I apologize and send out the missing bits with a few presents as sweeteners and haven't had too many fully agro people yet.