Sounds like your grandson has what my 12 week old son has, acid reflux. He can go on Zantac (same thing adults take) and it will help tremendously. Also you want to burp him often, sit him upright for 30mins to an hour after feeding and you could add a little bit of rice to his formula to make it thicker and easier to stay down. Enfamil AR is a formula with added rice, but my son couldn't use it, it was too thick and he has a bad suction with his cleft lip. You could just add a teaspoon of rice per 2-3 ounces to his formula. This has helped my son out to spit up only about 5% of the time instead of 100% of the time. The acid reflux is common in all babies, and has nothing to do with a craniofacial disorder. The stuffy nose (my son also has) sounds like he is spitting up through his nose, like my son is, even if you can't see it, he still may be doing it. Keep suctioning out his nose, but you will see improvement once he is treated for reflux. Other signs of reflux are gagging while eating, arching their back, gassy baby, spitting up after meals, and general fussiness. It hurts them to throw up, it is acidy coming back up! Good luck and feel free to email me if you need to
katieinlow@home.comKatie