I picked Frick up and of course, he had fleas. I couldn't find any on Frack, but if Frick has them, I'm sure he does too. The label on the Advantage box says not to give it to cats under nine weeks old or under two pounds. I know they're at least ten weeks old, probably twelve. Since Frack is the smaller of the two and he weighs two pounds, twelve ounces, they're good to go. So I gave it to them.
I guess they're ours.