im so glad to hear that you are not for crying it out! im totally against it, and it makes all the difference for my son. :) :) im so proud of you for following your gut and doing what you know your son needs.
as far as the ped saying he doesnt need to eat, im not so sure. perhaps try a second opinion? it doesnt sound right. my son (though breastfed only) was still nursing at night when he was between 13-17 months before he stopped. it was all on demand, and he wouldnt accept any alternatives to that, so i did what i had to do and he grew up to be just fine.
babies tummies are about the size of their fist, and when they go through a growth spurt, those tummies empty QUICKLY. i think its totally insensitive for your doctor to say that because your son is 24 lbs that he shouldnt have to eat at night. if hes hungry, hes gonna eat and theres no way in hell i as a mother would deny my child the right to eat if thats what he needs. so basically, im one of those "the doctor can shove it" opinions; doctors advice has its place and certainly can make a world of difference under a lot of circumstances, but in this circumstance, i think that your ped is totally wrong and totally off base giving this kind of information
check www.askdrsears.com. hes a breastfeeding supporter, but hes got some good info on bottlefeeding also. i guess the "idea" with formula is that it lasts longer in baby's tummy (like why is that a good thing again?) but fact of the matter is that it doesnt much matter. if your baby needs to eat, he needs to eat and anyone who thinks that they have the right to say otherwise is just asking for trouble.
so
basically, you do what you feel your son needs. it doesnt matter if hes 15 lbs or 25 lbs, if you know hes hungry, feed him, it doesnt matter what the time on the clock says or the weight on the scale. he will thin out tremendously when he starts getting around more especially walking.
each baby is different no matter what doctors or their dumb percentage charts think they will all grow at their own pace, whether that means they weight a lot or a little what matters most is that they are growing at a steady rate compared to themselves, not anyone else. so dont let this doctor convince you that you are doing anything wrong or that your son is fat just because he might be bigger than many kids his age; hes his own person, will grow at his own rate; ive known petite babies that grew up to be overweight and ive seen fat roly poly babies grow up to be rails. it doesnt matter as long as you know your son and are giving him what he needs. :) :)
just keep listening to your instincts! you sure have it made - when you do that, nothing can stop you from keeping your son connected and close to you!