There are several boiler (meat) chicken breeds that are suitable for farming in Kenya. Here are some of the best:

1. Kuroiler: Kuroiler is a crossbreed developed in India that is becoming increasingly popular in Kenya. They are known for their fast growth rate and high meat production. They are also more resistant to diseases than other breeds.
2. Cobb: Cobb is a breed that originated in the United States. They are known for their fast growth rate and high meat production. They are also easy to manage and have a good feed conversion rate.
3. Ross: Ross is a breed that originated in France. They are known for their excellent meat production, fast growth rate, and good feed conversion rate. They also have a calm temperament and are easy to manage.
4. Hubbard: Hubbard is a breed that originated in France. They are known for their good meat production, fast growth rate, and good feed conversion rate. They are also easy to manage and have a good temperament.
5. Arbor Acres: Arbor Acres is a breed that originated in the United States. They are known for their excellent meat production, fast growth rate, and good feed conversion rate. They are also easy to manage and have a good temperament.

These boiler breeds are popular among farmers in Kenya due to their high productivity and good adaptability to local climatic conditions. It’s important to choose the right breed that is well-suited to your particular farming environment and market demand.