Our LO is 11 weeks old. We have him on Similar Pro-Sensitive because the Pro-Advance was making him gassy and it seemed he wasn’t digesting it properly. Lately though, it’s been a battle to feed him. He fights the bottle, won’t take more than one or two ounces in a sitting. He cries throughout. We’re not sure if maybe it’s the formula? Maybe it’s time to try going back to Similac Pro-Advance? Does anyone have any experience / advice about going from Pro-Sensitive to Pro-Advance? We want to try something, because we want him to gain weight, but we also want him to enjoy feeding. This past week especially, he hates feeding. Any advice you all might have would be appreciated, thanks!