Close enough!
The gorgeous Black Copper Marans cockerel that hatched a day before my first Delaware clutch, and was sneaked into that clutch hours after hatching ... he weighed 4 lbs 15 oz the day I weighed all the Mr. Fatty cockerels.
He feathered faster, and is flirting with sexual maturity now ... as evidenced by one of our free-ranging hatchery cocks, Shade, giving him attention through the fence the past couple of days.
!. The line has most likely been bred for those qualities for years and generations - This line is only 4 years old from the cross but if you breed for it you can do it,
thats the assignment Grasshopper.
Found this interesting research recently-ish done in Canada, raising three historically significant breeds of chicken (1957, 1978, 2005) all the same way and comparing growth rates, efficiency, and anatomical features. The study does NOT look at Delawares, but rather "The current experiment included 2 University of Alberta Meat Control strains unselected since 1957 and 1978 (AMC-1957 and AMC-1978, respectively) and a 2005 commercial Ross 308 broiler (Aviagen North America Inc., Huntsville, AL). The AMC-1957 and AMC-1978 strains have been maintained unselected at the University of Alberta Poultry Research Centre, Edmonton, Alberta, since 1989. Source parent flocks were all 46 wk of age. The AMC-1957 strain was developed from 3 commercially available meat-type chickens and an experimental strain in 1957 at the Experimental Farm in Ottawa, Ontario, Canada, for research purposes by Ed Merritt, Robb Gowe, and Allan Grunder (Merritt and Gowe, 1962). This strain was the progenitor of the AthensCanadian Randombred (ACRB) control strain maintained at the University of Georgia in Athens, Georgia (Hess, 1962). More than 100 peer-reviewed papers have been published using the Athens-Canadian strain as a representative of meat chickens of the 1950s. Nine broiler breeder companies contributed sire and dam strain chicks to develop 2 AMC-1978 lines (strain 20 = sire, strain 30 = dam; Chambers et al., 1984). The present study used the dam line."
http://ps.oxfordjournals.org/content/early/2014/09/26/ps.2014-04291.abstract
And the full text HTML version ...
http://ps.oxfordjournals.org/content/early/2014/09/26/ps.2014-04291.full.pdf+html
and the full page PDF version ...
http://ps.oxfordjournals.org/content/early/2014/09/26/ps.2014-04291.full.pdf
Take a look at the photos on pages 4 & 5 ... !
I'm don't think my Delawares feather as fast as the 1957 birds used in this study. But their body shape is more like the 1978 birds. Not sure about their actual size/weights, as I didn't weigh them so young.
ANYWAY ... I'm always interested in better understanding the modern "meat bird" potential of the Delaware compared to other options. People rightly point out that the Delaware was the industry standard in the early 1950s, and a fair percentage of people working with Delawares now are breeding for meat. So I am always struggling to put that in perspective.
Especially since the Kathy's Line Delawares don't seem to grow super fast.