One of my customers reported that she was getting a lot of eggs with meat spots in them. Makes me wonder how many I'm getting like that. The other problem is that egg production is way down lately (6-8/day to 2-3/day). My hens are all 3.5 y/o or 2.5 y/o; are they just getting old? Their legs and combs are kinda pale (I haven't checked their vents 'cause it's been really cold ).
I would say your hens are a little on the old side for good egg production. Egg production really starts to drop off after 2 years.
Yup, increases with age. Here you go: http://www.thepoultrysite.com/publications/1/egg-quality-handbook/29/meat-spots
Yup, those girls are past their prime. You may consider retiring the 3.5 y.o. hens. The 2.5. y.o. hens may have another 6 months of good production in them, but egg quality is going to continue to deteriorate at their age. I consider culling when the girls reach 3 y.o. because they spend more time not laying than laying and the egg quality starts slipping a bit- shells start getting thinner/funky looking, meat/blood spots become more prevalent, whites get thinner, etc. The reason for your slow down is probably light related mostly, but certainly is age related as well. My nearly 4 y.o. hens (Yeah, I considered culling but I love these old biddies so I am stuck with them) have not laid any eggs since molting this fall. Fortunately, my flock has birds from all age groups, so I am still getting eggs despite their hiatus. Good luck.