Ah, that's tough! Both babies having the same issue at the same time does sound like it could be the formula, some mums I know have found Grow works well for their little ones, but a few have had gassy babies on it too, so it's really hit or miss. A friend actually switched formulas and saw improvement within days, though of course every baby's different. In the meantime, quite a few parents swear by using Colief Infant Drops alongside the formula to help with the gas and colic discomfort, worth trying before switching entirely. Do check with your GP or paediatrician though, just to rule out anything else and get their take on whether a formula change might help your little one.