Up until about a week ago Jace was attached to the b**b for what seemed like all day. Literally. But now it's like every three hours and he'll get hungry again.. Is it normal for them to change so suddenly? He's 2.5 months btw.
Edit: I'll try nursing him in between since that's what he's always done, but he'll suck for a minute or two and then be done.
He could have been going through a growth spurt! Also he could have been trying to get your supply up and did it :)