On a Side Note...

I love memos from our Homeowner's Association.  They're truly my comic relief for the day.  Here's the latest:

I just have two questions:

1. How exactly do you keep cats from roaming the neighbourhood?  Aren't most cats "outdoor" pets?
2. What is an "erf"[1], and how do you keep pets inside of one at all times?

[1]  This was actually an Afrikaans word that wasn't translated into English.  "Erf" means "property" in Afrikaans, which brings me back to question 1...