Hens at maturity are weighing out over 8 lbs for me. Maturity for a Cochin is aprox. 16 months not 12 like most breeds. Cochin are slow to mature. Someone asked about a rooster crowing which is also later than most breeds at a minimum 6 months and I have one that waited till 9 months. Hens begin to lay about 9 months, yet I have 2 girls that started at 7 months. For us the pay off is in the winter. Cochin are double feathered and more comfortable in winter so they lay all winter (at least mine have). We do not use extra light or heat in our chicken house. This is the normal time frame and growth we have found with our LF cochin. I think where you live makes a difference on how any chicken breed does in the area.It is said that the hens of this breed average around 8 lbs. I don't know where that weight stands today or if that was the stat of years gone by. I recently purchased 4 white hens and they are growing quite well. This breed was a parent bird used in the makings of the Belgian Malines that I currently have. I am hoping to interbreed to gain fresh blood into the malines without giving up meat flavor and weight loss. I could have used brahmas or langshans but opted for the cochins because I thought they had more to offer. If any of you are weighing your birds at maturity, I would care to know the weight you are achieving. Thanks.
Another thing we have found are that splash are weaker and have more defects at hatch then black or blue. Another LF Cochin owner I spoke to said it is because they have the weaker genetic line. Not sure how this works out because of their color but it is what we have found.
Good luck with all your Cochin I think you will love them, they are docile and fun to watch as they are so big it is more of a waddle than a walk =)