Introduction: Complementary feeding presents a challenge for very young children in Ethiopia as these foods are generally thin cereals providing little protein and micronutrients. We tested whether an egg-a-day and eggshell powder (ESP) providing calcium (Ca) will improve nutritional status of young children in a 6-month randomized controlled cluster trial in Southern Ethiopia. Methods: Study sites were randomly selected kebeles (villages) and assigned to Intervention and Control groups. All eligible children 6-12 months were enrolled. Each child in Intervention kebeles received a gift of two egg laying chickens (n=122); families received education on poultry production and consumption of egg. ESP (500 mg Ca) was given to children at ≥12 mo. The Control group (n=128) had standard nutrition education. Baseline and endline outcome measures included knowledge, attitude, and practice (KAP) of caregivers on the feeding of egg and ESP, anthropometry, child dietary intake frequencies, egg sensitivities, hemoglobin, and morbidity symptoms. Results: Egg and ESP consumption in Intervention children averaged 17 days/month compared to < 1 in Controls. KAP of mothers improved only in the intervention group (p<0.001). No true egg allergy occurred, however, 7.5% of Intervention children were sensitive to eggs. Linear regression analysis showed the egg+ESP intervention increased weight-forage z-score by 0.24 (95% CI, 0.11-0.37) and reduced underweight (RR, 0.35; 95% CI, 0.16-0.74). Stunting prevalence increased in both groups, but by 28 % less in the treatment group (RR, 0.72; 95% CI, 0.53-0.98) compared with control. Mean hemoglobin increased and anemia decreased in both groups, however, much greater anemia reduction [52% (RR, 0.48; 95% CI, 0.24-0.96)] was seen in the treatment group. Conclusion: Promotion of egg and ESP consumption with poultry intervention significantly improved the nutritional status of young children, demonstrating the potential of an integrated approach to contribute to the country"s target to reduce malnutrition.