D.B.
Hi R.,
My advice to be to feed him when he's hungry...whatever he will eat/drink...and don't worry too much about what a child "should" be eating according to some book or website as every baby is different. Don't stress too much about it. At this young age, babies tell us what they want not the other way around. If he'll take more milk...then by all means, let him have some.
Perhaps your son doesn't like milk and prefers formula? Or do you mean formula when you say milk? Either way, I'd say don't stress too much...as long as he's eating AND drinking, then there is no health or digestive problems to worry about.
My son, who's 3 now, was ALWAYS a picky eater and would go days with eating next to nothing at times. It worried me like crazy, but I realized that as long as they're eating something, then there's no medical problems.
If you're terribly worried, then I'd say to check with his pediatrician, but I'd simply advise you to go with your motherly instincts on this one...your child is eating and drinking...so we're good. :)
Good luck.
http://www.thewritersnotion.com