Chicken vs Egg (Which came first?!)

[carmel]

Do you think the chicken came first, or do you think the egg came first?
+1 for egg
-1 for chicken

Starting number: 500
Egg wins if the number reaches 1000
Chicken wins if the number reaches 0

Feel free to say why you think which came first!
I'll start.

499

[Storybook]

498

[Sphye]

499
Eggs can come from more than just chickens, so the requirement becomes "were chickens the first egg-layers" rather than "does the chicken need to hatch from an egg to exist, or lay an egg for more chickens to subsequently exist?"