Chickens are fascinating creatures that play a crucial role in our lives. Whether we appreciate them as pets, egg-layers, or as a source of meat, understanding their growth is essential. From the moment they hatch from their eggs, chickens undergo a remarkable journey of development. In this article, we will explore the growth stages of chickens, from hatchling to broiler, and gain insights into the factors that influence their growth. cost of raising chickens

Hatchling Stage

The life of a chicken begins as a hatchling, emerging from an eggshell. During this stage, chickens are incredibly fragile and require careful attention and protection. Newly hatched chicks possess a few essential characteristics:

  1. Yolk Sac: The yolk sac, absorbed just before hatching, provides essential nutrients for the first 48 hours of life. It sustains the chick until it can eat and drink independently.
  2. Down Feathers: Hatchlings are covered in soft down feathers, which provide insulation and help regulate their body temperature.
  3. Limited Mobility: Chickens are initially unable to stand or walk effectively. They primarily rely on their instincts to find warmth and food.
  4. High Vulnerability: Due to their small size and delicate nature, hatchlings are vulnerable to predators and environmental stressors.

Brooding Stage

To ensure the healthy growth of hatchlings, they require a brooding environment, which includes heat, proper nutrition, and protection. Brooders, such as heat lamps or heating pads, maintain the optimal temperature for chicks (around 95°F or 35°C) during the first few weeks. A clean, dry, and well-ventilated space is also crucial for their well-being.

During this stage, baby chicks transition from their yolk sac dependency to a diet of commercial chick feed. This feed is specially formulated to provide the essential nutrients required for growth, including protein, vitamins, and minerals. Adequate access to clean water is equally important for their development.

Growth in the Brooding Stage:

  • Week 1: Hatchlings double in size during the first week, developing stronger legs and wings.
  • Week 2: Feathers begin to replace down, allowing better temperature regulation.
  • Week 3-4: Chickens become more active, exploring their environment, and continuing to grow rapidly.

Juvenile Stage

Around four to six weeks of age, chicks transition into the juvenile stage. During this phase, they continue to grow, feather out, and develop their adult plumage. Juvenile chickens can typically regulate their body temperature without external heat sources and are ready to move to a more spacious coop or outdoor environment.

Key milestones during the juvenile stage include:

  • Feeding transition: Chicks shift to a grower feed, which has a lower protein content than chick feed.
  • Increased activity: Young chickens start exhibiting more natural behaviors, such as scratching and pecking.
  • Socialization: Chickens establish pecking orders and hierarchies within their flock.

Adolescent Stage

Around 12 to 20 weeks of age, chickens reach adolescence. At this point, their growth rate starts to slow, and they undergo significant hormonal changes, especially in preparation for egg laying (in the case of hens) or muscle development (in the case of broilers).

Key developments in the adolescent stage include:

  • Egg production (for hens): If the chicken is a laying breed, she will start laying eggs around 5-6 months of age.
  • Muscular development (for broilers): In the case of broiler chickens bred for meat, they will be ready for slaughter between 6 to 12 weeks of age, depending on breed and feeding practices. can chickens eat tomatoes


The growth of chickens is a fascinating journey that encompasses various stages, from the fragile hatchling to the fully grown adult. Proper care and nutrition play pivotal roles in ensuring the healthy development of these remarkable birds. Whether you raise chickens for eggs, meat, or companionship, understanding their growth stages is essential for their well-being and your success as a poultry keeper.