Black oil sunflower seeds (BOSS) are a highly nutritious, energy-rich treat for chickens, offering healthy fats, protein, vitamins, and minerals that promote shiny feathers, warmth in winter, and better egg production, but they must be given in moderation (about 10% of diet) as they are high in fat, and you should provide grit for digestion, scattering them to encourage foraging.
Benefits of BOSS for Chickens
High Energy & Fat: Great for weight gain and warmth in colder months due to their high oil/fat content.
Feather Health: Oils contribute to glossy, healthy feathers, aiding insulation.