Received: 11 October 2020
Accepted: 19 January 2021
First Online: 2 February 2021
Ethics approval and consent to participate
: Ethical clearance was not required. Poultry feeds were bought from the outlets. The study was approved by the Kenya National Commission for Science, Technology and Innovation and authorization given by County Commissioner, Kiambu County Kenya.
: Not applicable.
: The authors declare that they have no competing interests.