A thousand eggs all nice and warm is a counting song known by both Breq and Sphene. As with Ninety-Nine Bottles of Beer on the Wall, each verse is the same except for the number, which counts down as the song progresses.
The lyrics are as follows:
A thousand eggs all nice and warm
Crack, crack, crack, a little chick is born.
Peep peep peep peep! Peep peep peep peep!
Nine hundred and ninety nine eggs all nice and warm
Crack, crack, crack, a little chick is born.
Peep peep peep peep! Peep peep peep peep!