Boy your question takes me back- ds is now 31/2 and he used to polish off 2-8oz bottles before bed dirring a growth spurt AND wake up about 6 hrs later for another bottle.
DO NOT put cereal in his bottle - not only is there the possibility of choking like your ped said but there is also the poss of allergy- wait to give solids. Also you don't want your son associating the bottle with solid food(harder to wean later).
was lucky with dd ( now 15 months) she took to breast feeding - maybe that's not so lucky

since she is a chow hound just like her big bro. But both the kids are in great shape for all they eat- Son is 43inches and 38 lbs and dd is 29 inches 22 lbs. Feed him as much as he needs and once he is in solids feed him quality food he'll grow...