Oh yes, the Neocate BMs smell horrific! I would say that Paige had less gas after switching to Neocate, but you could definately notice the smell a lot more if she passed gas.
How old is your little one? Is he eating any other foods, or just Neocate? I find Paige’s gas was TERRIBLE when we did solids trials, or when she was on breast milk and Pregestimil prior to switching to Neocate. For her, lots of gas and painful cramping/bloating has always been a symptom of food intolerances.