Kenbro chickens are a popular breed of indigenous chicken in Kenya that are known for their high egg-laying capacity, quick maturity, and resilience to harsh environmental conditions. However, there are also some disadvantages associated with the Kenbro breed, including:

1. Size: Kenbro chickens are generally smaller in size compared to commercial breeds like broilers. This means that they may not be as profitable for meat production.
2. Meat quality: While Kenbro chickens are a dual-purpose breed, they are not as meaty as some other commercial breeds, and the quality of their meat may not be as good.
3. Availability: While Kenbro chickens are a popular breed in Kenya, they may not be as readily available in other parts of the world.
4. Disease susceptibility: Like all chickens, Kenbro chickens are susceptible to various diseases and parasites, and if not properly managed, this can lead to significant losses.
5. Market demand: Kenbro chickens may not be as popular in some markets compared to other breeds, which could affect their profitability for farmers.

Overall, while Kenbro chickens have many advantages, farmers need to weigh the pros and cons when deciding whether to raise this breed.