I say definately bring em back to life and start feeding them.

All my adult males are have now been on heat for over a week and feeding voraciously. I'm bringing the adult ladies out in a few days.

A tip for those that are breeding theirs this year. Make sure you put the males in with the females right away after you turn the heat on. Some of the females will be ready ASAP. If they're not ready, you will know it because they spaz out when the male tries to breed her.