Eating your own ... dog food?

There's a concept in software development called "Eating your own dog food".  Basically, it means that you use the products that you write.  For example, Microsoft released a beta version of Sql Server 2008.  They're using it on their own sites.  That's what eating your own dog food is all about. 

Having set all that up, here's something I just read on Overheard in the Office: 

Engineer #1: Why on Earth do we have to use this?
IT worker: We're committed to using our own solution.
Engineer #1: Yeah, I understand the dog food rationale.
Engineer #2: The problem is that it's not dog food. It's kitty litter.

Overheard in the Office | It Only Solves the Back End of the Problem