If they are refusing to drink milk, it may be a problem with the milk that they're drinking. If this is the case then it's time to see a doctor. There can also be many other reasons as to why baby refuses his/her mother's milk. Things like anemia, gastro oesophageal reflux disease, and hyperthyroidism (among other things) could also warrant refusals of breastfeeding. If your baby is hungry, but refusing to drink milk, try adding pureed solids alongside the breastmilk. For example, you can mix puree peas with formula or breastmilk to increase the caloric content of what they are drinking without substantially changing the flavor.