Im buying 500 eggs sometime this week, and 100 worms to start me off. Is it possible to put say.. 400 of these eggs back into the fridge to keep simulating winter and only hatch batches of around 100 at a time? Or once they are out of the fridge and mailed to me will they begin the hatching process?

Also, which mulberry food is better, the powder or the cubes?

Thanks
-----
Cranbrook, British Columbia
0.0.2 Baby Leopard Geckos (Unnamed)
1.0.0 Green Anole