Cornish Cross Broiler - 8 Weeks +

Cornish Cross Broiler - 8 Weeks +
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Hatching year-round.

Don't let the words "slow growing" fool you. Cornish Rock Broiler Chickens get very large, pretty darn quick, they just take a couple more weeks than the "Six Week" variety.  While the Fast Growers are a COBB 500 or ROSS 308 Strain that was perfected for the quickest grow-out and large breast meat, the ROSS 708 Variety came along a little later to address the issue with leg problems the COBB 500 and ROSS 308 strains were having by allowing the extra time necessary for the birds' legs to get as strong as they need to be to support the rapid growth overall.  With this, came a variety that doesn't just grow a large breast, but has a more balanced growth of the leg and thigh as well.  Those of us who love our dark meat will love this strain, too! 

Cornish Rock Broilers ( ROSS 708) are still large birds with red wattles and combs, but they won't have the variable black flecks that the fast-growing strains have. Like all Cornish Cross varieties, they have strong-looking, thick, yellow legs, and feet. And they are still fast-growing, with as little as 12 weeks to maturity. 

Production: The Cornish Rock Broiler is one of the most efficient broilers or meat chickens available. At 10 weeks old, males can weigh 6 pounds and females 5 pounds. Males should gain just under one pound each week; females grow a little slower. Although these big, slow-moving birds are too vulnerable in a completely free-range environment, they can do quite well when raised in chicken tractors and other well-protected on-ground situations. They do not fly and can be contained with low fencing. These are the same type of broilers that Joel Salatin raises so successfully.

Caring for your Cornish Cross Broiler Chicks:
All of our Slow-Growing Cornish Rock will have Coccidiosis Spray and Marek's Vaccinations upon shipment.  The fact that the 708 Slow-Growing variety is simply on this Earth a little longer is a wonderful reason to protect them from two of the biggest reasons for failure that exist to Broiler strains: Coccidiosis and Marek's Disease.

Before shipment, we will spray your chicks to help protect against Coccidiosis. The spray is absorbed through the skin. DO NOT FEED THIS VARIETY MEDICATED FEED. Although the medicated feed will not harm the birds, it will counteract the spray. The sprayed chicks may have a dye on them, which will wear off in time. Marek's vaccinations will also be applied, this is not a cure, but will protect your birds from contracting this disease that can be devastating to your flock. Please note that if you already have birds that do not have the Marek's Vaccination, you should NOT purchase this variety.  Marek's vaccination sheds off the birds and can spread Marek's to untreated birds. 

Cornish Rock Broilers grow very fast, and that doesn't leave room for many mistakes. Every aspect of their lives is condensed. Be sure that they have access to clean water constantly and that you watch and adjust the height and amount the waterers hold according to your birds' growth.

Feed is also very important. Make sure that every day counts positively toward optimal growth and health. Use high-quality and dependable food, that is fresh and not at all moldy. Chick starter is appropriate for the first 5 weeks. Switch to broiler or grower feed from 5 weeks to butcher. 

Avoid free-feeding your Cornish Rock. Offer free-choice chick starter for the first 5 days. After that, make the feed available 12 hours on and 12 hours off for proper growth. Cornish Cross Broilers don't always know when to stop eating, and if you give them constant access to food, their bones may not keep up with their body weight.

Genetics: Many customers are looking to recreate or breed their own Cornish Rock Broilers by utilizing our Cornish chickens bred to our Plymouth Rock chickens. However, the offspring of this mix will not be the same as these Cornish Rock Broiler chicks. Also, Cornish Cross Broilers are hybrids, and so if two are bred together, they will not produce the same high-quality chicks as themselves. They will also probably be too large by the time they reach sexual maturity to breed naturally. The Cornish Cross Broilers we offer have been scientifically bred for many years by scientists to produce this highly efficient production bird.

Temperament: Cornish Rock Broilers are docile and calm birds. They are not very active in general and will spend much time especially after 3-4 weeks of age, sitting on the ground. Litter and flooring will need to be kept dry and clean so that the birds do not develop blistering and bruising on the breast. They do not do well in a completely free-range environment and are not good at avoiding predators.

Body Type: Cornish Rock Broilers are very heavy, muscular, and pugnacious-looking birds. They have large, thick legs and a very wide body. These are wide and broad birds in general, with legs spaced quite far apart. When viewed from above, they have an almost heart-shaped appearance.


Feed Conversion Rates for Cornish Cross Broilers
Weeks of Age
Average Weight in Lbs
Feed Consumption per Week
Total Feed Consumption to Date
0.35 lbs
0.3 lbs
0.3 lbs
0.85 lbs
0.62 lbs
0.92 lbs
1.54 lbs
1.02 lbs
1.94 lbs
2.38 lbs
1.44 lbs
3.38 lbs
3.34 lbs
1.9 lbs
5.28 lbs
4.37 lbs
2.32 lbs
7.6 lbs
5.4 lbs
2.73 lbs
10.33 lbs
6.42 lbs
3.10 lbs
13.43 lbs


Current Reviews: 80

  • Model: CCBC

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Hatching and Shipping begins February 4, 2022!

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Cornish Cross Broiler - 8 Weeks +

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