Some brds are worth far more than others. The idea of checking out Craigs List for comparable ones is a good idea if your birds are feedstore/hatchery production birds. If you have show birds, heritage birds, rare breeds, etc., that will not give you a good estimate for replacement costs. I would be very surprised if a court ruled that you should be paid for eggs your bird might have/would have laid. If you get the cost of a comparable replacement, that replacement bird should be providing the eggs that you would have/should have gotten, and to be paid for the eggs as well is redundant. However, do ask to be compensated for the damage done to coop, fences, etc. And if you or your children were traumatized, be sure to include that. Chances are that an adult would not be given an award for being traumatized, but a child very well might.
FOr the $10 per bird in VA, are you sure that is a maximum rather than a minimum?