He's just over 8 months old. Avent is what we've been using for the entire 8 months. Enfamil gentlease and A.R mixed together (x 4-5 months now because of urpage issues) and I tried putting more gentlease in vs A.R. I've tried ice cold, cold, lukewarm, warm for the bottle. I've tried waiting after his solids, before his solids, during his solids. In the last 2 1/2 weeks, this whole thing has been going on. Yesterday the total amount of formula I got down him was a grand total of 10 oz for the entire day. However, he ate his solids with vigor and had wet diapers. He'll suck on the bottle and then stop. I've tried the oralgel before the bottle and that just ticks him off even more and then he's too wound up to take the bottle. Like I said before, I've tried the sippy cup, regular cup, small shot glass--everything. He won't take the formula in his cereal--tried that and he just had the look asking me what in the heck was I doing to him. He'll take a little bit of water in a sippy and that's it. I'm getting to the point where I'm about to call the pediatrician and make sure he doesn't have reflux. He probably had it while he was around 3-5 months and then we switched him to mixing in a little thicker formula to the gentlease. And Gramma has tried everything also. This is a woman who's raised 3 kiddos and she's at the end of her ideas.