One good first step would be to print the BMI data for the child (you can do it from our website) and show it to your spouse. Have a discussion of what it means for your child’s current and future health. Of course better than one BMI measurement would be a copy of your child’s growth chart to observe for upward shifting across percentiles suggesting excessive or rapid weight gain.
If resistance persists, make an appointment with the child’s pediatrician and both be present. If the child is found to have a BMI greater than 85% and/or the child’s BMI has crossed percentiles upward, there is likely a weight issue. The doctor can explain to your resistant spouse the risks of overweight/obesity and the initial steps of management.
If these steps fail, remember “family therapy” just means that the child is not alone. You and the child (and siblings!) are a familial unit.