The Females on Lwimba Ranch go through a stringent selection process. At weaning the top 80% are chosen on conformation, as well as weaning indices. Then at two years of age their conformation is checked by Independent Santa Gertrudis inspectors, as well as their 12 m and 18 m indices. All the poor doers are sent to the feedlot. 

Those that remain are mated with specific bulls, and all news to calf by 36 months, although most of the females are calving at 30 months. Any female that doesn’t calf down is culled due to poor fertility.

They will remain in the first calver herd for two calvings, and then they will join the main cow herd. Here they remain as long as they are producing a calf each year.