Yes, any change in diet could change your baby's output consistancy and frequency. Some babys react by pooping more often and some react by pooping less often. Either way, as long as your baby is pooping that is great. If your baby hasn't pooped for over 5 days or your babys poop becomes very hard (sometimes balls stuck together), it is important you see your doctor. If your baby shows any distress or pain when they are passing a bowl movement also see your doctor. If your baby has had very liquidy poops, also see your doctor. These are signs of dehydration or bacteria and often need to be treated.
However, if your babys poops are slightly firmer or looser, their is usually no cause for worry. Adding a little extra water in your babys diet will help. This is a great opportunity to offer water in a sippy cup with the solid meals to help wash down food and teach your baby drinking from a cup.
In any case, follow your instincts. If you feel there is a problem or a concern, play it safe...visit your doctor.
We started solids about 1.5 months ago and all is going well. Recently, possibly aligning with the introduction of meat, my babies poo has changed. Firmer (ie formed but still mushy like play-do), but only a little bit at a time, every few hours! This is making for many more poopy diaper changes. We do give a little water. Is this normal?