My DD is 5 months, and she is also having "problems" with the breastfeeding. That is, she's so distracted by the rest of the world that she doesn't really want to feed, especially during the day. So she sucks for about 10 seconds, then pulls off to peer around. Sometimes she doesn't even want to suck at all, and just cries when I hold her across my lap in her feeding position.

Now I am fairly sure that there is nothing wrong. Almost all of the babies in my parents' group are doing similar things. It seems to go with the age, and their new level of interest in the world around.

Maybe there's nothing wrong with your baby either, just a developmental stage.

Whatever it is, I hope it passes soon.