I agree with Trillian, if he is happy on the formula he is on now then I wouldn't change it as changing formulas can upset their little tummies anyway. have you tried increasing the amount he gets at each feed, maybe he just needs a little more milk? But DD is 5 months old and is lucky to make it 3 hours between feeds so I don't think 2.5 hrs is that bad, his tummy is only small and can only hold so much.

With the catnapping, again DD only ever used to sleep for 30-40 mins at a time. These days she is starting to stretch out longer, has a 30-40min sleep in the morning while we are taking the dog for a walk, then has a 1.5-2hr sleep around the middle of the day and a 1-1.5 hr sleep in the afternoon. Every baby is different, and my MCHN kept telling me she wasn't sleeping enough and to make her sleep more, but really if she doesn't want to sleep she isn't going to sleep no matter how hard I try! It was distressing her more trying to make her go back to sleep when she woke up, than just letting her set her own routine.

She is now sleeping a little longer than she used to do, I just let her sort herself out and didn't try to force her to sleep longer. Your little one may do the same as time goes on, he's only 9 weeks so plenty of time to sort it out! it took me probably until 10-12 weeks before I felt comfortable in the routine we were in and felt like I knew what I was doing.