A new study suggests parents should be aware of babies with big appetites.

The appetite and growth study says hearty-eating infants are more likely to be obese later in life.

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The study looked at 3-month-old twins and found that the twin who was more enthusiastic about food and took longer to get full gained 2 pounds more than the less enthusiastic twin by age 15 months.

Dietician Tanya Zuckerbrot says one in three children is overweight or obese. She says there are recommended guidelines for what infants need to consume and that just because a baby is crying doesn’t mean he or she is hungry.

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Dr. Susan Bartell, a psychologist, says focusing too much on calories and diet early on in life can lead to eating disorders.

Watch the clip above for more on the study.