I thought it was curious that he focused on the use of this device for Farley, when Lynn often uses it for humans. I spent waaaayyyyy too much time going through some of the monthly archives watching for "fleas" and I broke them into two categories, "Gratuitous/random" and "Eating."
Gratuitous/random:
Friday July 13, 2007--John
Sunday, September 9, 2007--Mike
Sunday September 30, 2007--Liz
Sunday June 15, 2008; reprint of June 22, 1980-John; fits both categories
November 7, 1979; reprinted January 17, 2008--notice that Elly's final panel expression was revised from rage to gobsmack--Elly
Sunday November 25, 2007--Dee
Monday October 1, 2007--Dee
Eating (less a matter of "fleas" than crumbs spewing from food or mouth):
Monday August 13, 2007--plate-sized greaseburgers
Tuesday August 21, 2007--Deformed-face Liz eating chips
Friday August 31, 2007--April and the butter tarts
Wednesday June 20, 2007--April eating a sandwich
Saturday September 2, 2006--April and John eating cookies
Monday October 29, 2007--April and Liz eating pizza