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Valley Hatchery LLC

Jumbo Cornish Cross Broiler Chicks


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Are you seeking the prime option for efficient meat production? Look no further than the Jumbo Cornish Cross Broiler, meticulously bred to deliver exceptional results. Derived from a blend of the commercial Cornish chicken and the White Rock chicken, this exceptional breed promises unmatched performance.

With a targeted focus on meat yield, the Jumbo Cornish Cross Broiler has been purposefully developed to excel in the realm of meat production. We emphasize that this breed is not recommended for pet companionship or breeding endeavors. Instead, its genetic makeup makes it an unparalleled choice for those who prioritize optimal meat output.

We urge you to consider raising these chickens separately from other poultry due to their rapid growth rate, which may inadvertently impact smaller breeds. To ensure their robust development, provide a high-protein ration of 21% or higher. It’s important to note that nurturing one chick to 8 weeks of age necessitates approximately 14 lbs of feed, resulting in an average live weight of around 6½ pounds at 8 weeks.

For ideal results, harvesting the Jumbo Cornish Cross broiler is advised between 4 and 10 weeks, depending on your desired weight specifications. Beyond this window, health issues may arise concerning the heart, bones, muscles, tendons, and even sores due to prolonged periods of inactivity.

The rapid growth of these chickens can lead to leg issues and fluid accumulation in the body cavity, known as Ascites. In such cases, controlling their feed intake becomes crucial to moderate their growth rate. By limiting feed during the nighttime hours, you allow their bones and tendons to catch up with the accelerated muscle growth. We recommend starting to restrict feed intake for Jumbo Cornish Cross at 2 weeks of age by withholding feed during the night. This practice aids in slightly slowing the bird’s growth, enabling their skeletal framework to synchronize with swift muscular progress. It’s worth mentioning that when employing feed restrictions, avoid using fine bedding materials like sawdust or small shavings, as the birds will eat the fine material and it will lead to illness and mortality.

It’s essential to consider your location when opting for the Jumbo Cornish Cross broiler, particularly if you reside at an elevation of 5,000 feet or more. High altitudes can potentially render these chickens more susceptible to heart-related issues and other health challenges.

Valley Hatchery offers the Ross 308 bloodline, which stands as a hallmark of efficiency and value in broiler chicken breeds. Recognized for its remarkable growth rate and high mass-to-bone ratio, the Ross 308 is the preferred choice for both small- and large-scale poultry farms alike.

Featuring a classic appearance with its single white plumage and upright tail, the Ross 308 boasts an active and sturdy physique. With a distinctive yellow beak and unfeathered yellow legs, this hybrid showcases traditional pinkish-red combs and wattles. A testament to its rapid development, the Ross 308 matures in a brief 38 to 41 days.

Distinguished by its generous chest and oval body structure, the Ross 308 possesses sturdy legs that facilitate its mobility and activity. The meat distribution in both the chest and thighs is exceptionally favorable. Notably, the skin of the Ross 308 is lightly shaded without any pigmentation, underscoring its focus on meat production.

The Ross 308 is characterized by its docile temperament, devoid of notable aggressiveness. This adaptability allows these birds to flourish in varied production systems, adapting seamlessly to sedentary lifestyles.

Choose Valley Hatchery for your Jumbo Cornish Cross Broilers and the Ross 308 bloodline for a poultry experience defined by unparalleled meat production and exceptional quality. Your journey towards optimal meat yield begins here.


Straight Run (Not Sexed)

Poultry Type

Large Fowl Chickens

Purpose & Type

Meat Production

Egg Shell Color

Light Brown

Egg Production


Egg Size






APA Recognized


Breed Availability

Date Straight Run

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