I started early with doctors consent at around 2 months he digestes it well and he is a very healthy baby . Chunky but healthy and he has never choked on it
Also don’t listen to anyone telling you to add cereal in the bottle so the baby can be full longer and sleep longer. Kids at that age are suppose to feed every couple of hours and they have tiny stomachs they are suppose to get hungry and eat a lot of times
Don’t put any cereal in the bottle. It’s not good for their stomach, and has no nutritional value. And can be a choking hazard. At 6 month you can start trying oatmeal with a spoon. Only reason you’d add cereal to a bottle is by doctors orders because of acid reflux