DS was exclusively bf until 4 months at which time I introduced Nestle Good Start formula at the df, offering 4 oz of the formula mixed with 4 oz ebm. Over the past 2 months I have slowly weaned him from bfing to that same formula and starting two weeks ago he was exclusively on the formula. As he is almost 11 months, I decided to introduce the Nestle Follow-Up Transitions formula. He has been on that formula for 2 full days. The past two mornings, he has had 3 very mushy poops within 2 hours of waking up in the morning and about 6 poops a day, compared to 2-3 usually. He also has a bit of diaper rash, it isn't bad at all but definitely something that concerned me as he has had very few bouts of this in the past and those that he has had have been very minor. Any thoughts or experiences similar to this? I'm not sure whether he is having a reaction to the formula or if it is just coincidence with another bug of some sort. He has had a lot of dairy over the past 3 months - yogurt, cheese, cottage cheese - and has no reactions to them. To be on the safe side, I picked up another small tin of Good Start and am going to give this to him for a few days to see if everything clears up and then I will try the Transitions again for a few days to see what happens. The poops are the only thing I'm noticing, he hasn't been vomiting or seems in any sort of discomfort.