My next question is going to be how much do everyone's eggs and hens weigh ;-) My 4 lb hen about 9 months old lays about 64 or 65 gram eggs. They are steadily getting bigger as normally happens I guess.
The question I'm really thinking about is type.. so I wanted to start out with the goal of the chicken. If it is a layer and we don't really need it to weigh that much then the leghorn type makes sense. Leghorns are little and lay big eggs.
If we want a bigger bird for any reason (because the SOP says so? because they might fly less and be calmer? or other reasons) then the rounder type makes sense to me.
Personally I care about auto-sexing with egg laying primarily so all that makes me think the leghorn type would be my choice. The good feed conversion and flightiness of the leghorn are good things IMO because it should enhance that "predator avoidance" skill when free ranging that's been advertised for the breed.
It detracts some from the cuteness factor that the rounder birds have and risks taking away some pet quality to me.
Sorry for the confusion...I just checked the Henderson's guide and the largest breed listed as a Laying breed was the Miroca listed at 7lbs. Laying breeds that were listed at 6lbs included the Spanish White face, Redcap, and Catalane. Other medium weight layers would be the Americana (5.5lbs). By heavy weight layers I was thing of breeds that are good layers. Yes by definition a heavy weight layer breed IS a dual purpose breed. I am not sure what the in year laying records are for the Plymouth Rock or Orpington, but was thinking that I had heard of laying strains that lay 6 eggs a week at the peak of production. I am not sure what size eggs they lay or how much they eat but would think that you could still have an efficnet layer that is more than 4-1/2 lbs.
I put about 15 CLB hens (all over 12 months old at the time) on the scale in October before culling. The smallest hen was a hair under 4lbs. All the rest were between 4-1/4 to 5 lbs. I would have to check records, but think my average eggs size is about 65 grams. with about a 4 gram average egg size variance from individual hen to individual hen. My record is a 73 gram single yolk egg and 81 gram double yolk egg (both from the same two year old hen who averages about 69 grams eggs)
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