[M Kehoe]

What has four legs in the morning, two legs in the afternoon, and three legs in the evening?

I just had to post that...

5.56mm

[Swordmaker]

What has four legs in the morning, two legs in the afternoon, and three legs in the evening?

The cootie in the Cootie Game being played all day by two toddlers.

[cowtowney]

"What has four legs in the morning, two legs in the afternoon, and three legs in the evening?"

Man. That's a tuffy.