Climate change and extreme weather conditions remain major threats to the attainment of well-being outcomes such as food security in sub-Saharan Africa. Thus, it is critical to identify and promote resilient value chains in order to ensure food security in the wave of extreme weather conditions such as drought. This study seeks to evaluate the effects of participating in indigenous chicken markets on smallholder farmers’ food and nutrition security in terms of household dietary diversity score. Cross-sectional data collected from 215 randomly selected farmers in Chiredzi and Mwenezi districts, Zimbabwe was used in this study. The endogenous treatment effect model was employed to determine the effects of market participation on household dietary diversity score. The findings showed that 76% of interviewed farmers participated in indigenous chicken markets. On average, participating in indigenous chicken markets increases the likelihood of having a higher household dietary diversity score by about 60%. This suggests that engagement in indigenous chicken value chain strengthens smallholder farmers’ resilience through attainment of food and nutrition security. Therefore, investment in capacity building of smallholder farmers to engage in indigenous chicken value chains should be prioritised and to support market engagement, indigenous chicken production contract arrangements with private firms should be promoted.