Do fleas count as critters?

A few of those have turned up in the last few days so we'll be resorting to flea products soon. Right before I was about to hit 1000 we saw a dark shape in the woods on a walk, and I did think for a moment, there's my next cat, but it turned out to be the neighbor's dog. (It was a hazy dusk and it was far off when first seen.)
I did look for some pet jokes for #1000, but just didn't find anything really suitable, but if I run across something good I'll post it. Might take awhile, I'm just awfully busy these days....