Kenya has several breeds of layers that are suitable for commercial egg production. The following are some of the best layer breeds in Kenya:

1. Kuroiler: This breed is a cross between Rhode Island Red and an Indian breed called the Indigenous Kadaknath. Kuroilers are known for their high egg production, with an average of 280-320 eggs per year. They are also resistant to common poultry diseases and are adaptable to different climatic conditions.
2. Kenbro: This breed is a cross between the Kenyan Indigenous and the Rhode Island Red. Kenbros are known for their high egg production, with an average of 280-300 eggs per year. They are also resistant to diseases and are easy to manage.
3. Rainbow Rooster: This breed is a cross between the Rhode Island Red, Plymouth Rock, and New Hampshire. Rainbow roosters are known for their high egg production, with an average of 280-320 eggs per year. They are also resistant to diseases and are easy to manage.
4. Isa Brown: This breed is a cross between Rhode Island Red and Rhode Island White. Isa Browns are known for their high egg production, with an average of 280-320 eggs per year. They are also docile and easy to manage.
5. Hyline Brown: This breed is a cross between Rhode Island Red and the Rhode Island White. Hyline Browns are known for their high egg production, with an average of 280-320 eggs per year. They are also resistant to diseases and are easy to manage.

It’s important to note that the choice of the best breed of layer chicken in Kenya will depend on various factors such as climate, market demand, and management practices.