My daughter is 5 1/2 months old and im not sure im doing this right. She wakes up about 6am i feed her approx 240ml then 4 hours later she eats 2 tablespoons of rice cereal mixed with approx 80mls of her bottle then i feed her 180mls of bottle. 4 hours later the same thing and at night its just 240mls of bottle. Lately she hasnt been drinking all her bottle. every feed she'll leave about 60ml and it takes me over an hour to feed her. Is this all normal??