Is it okay for my 3 month old to not want to eat as much now? he eats his full 6 ounces with 1tsp of rice cereal (my son my choice, deal with it) at night (we have been giving him rice cereal since about 2 months and about a week or 2 and he's done fine, pooped normal and fed regular) but now it seems like he plays with his bottle more than eats it and we tried using a different nipple and he just started choking because the flow was too fast, he's only eating maybe 2 ounces at a time during the day, we exercise him regularly and same amount of wet diapers so far, and 1-2 Poopie diapers. Is this normal?