regex help

[Marc Perkel]

Trying to do something complex and not sure how it's done. What I'm 
looking for is to combine 2 conditions in a single regular expression so 
that both have to be true for a match. Yes - I know I can make 2 SA 
rules and combine them but I bet there's a way to do it in one 
expression. For simplicity here's the challenge.

A chuck of text has to include the word "cat" 5 time and the word "dog" 
4 times to be a match. How do you do that?

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Marc Perkel - Sales/Support
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