Introduction: The prevalence of cow's milk allergy (CMA) has been increasing in children. The current study evaluates if having a sibling with CMA affects milk and dairy product consumption and eating habits for the children who do not have CMA and if having a child with milk allergy causes anxiety in the family for their healthy kids. Method: A telephone survey was conducted on the parents of the children who had been diagnosed with CMA were still on an elimination diet. Those whose diet has terminated, or those without a sibling or with a sibling that also had CMA were eliminated. The questionnaire was prepared for the healthy siblings. Results: A totally 108 children were included. Fifty four of them were female (50%). The mean age was 8±5 years. After the diagnosis of their siblings, 104 of the healthy kids (96.3%) continued to consume milk and dairy products, although their weekly consumption had significantly decreased (p=0.008); and 4 (3.7%) were completely deprived. Ninety-three of the healthy siblings (86%) continued to consume milk-containing junk food. Furthermore, 38 of the families (35.2%) stated their concern about their healthy kids' transition period to supplementary food. Conclusion: Although the siblings without CMA continued to consume milk and dairy products, they had a statistically significant decrease in the frequency of consumption. The high consumption of milk-containing junk food reduces the quality of their nutrition. Therefore, when a child is diagnosed with CM, monitorization of his healthy siblings for their nutrition, regular growth and development may be advised to prevent potential complications. [ABSTRACT FROM AUTHOR]