Baby fussing on the boob!

I’ve noticed in the last couple of days that my 12 week old has been fussing on the boob if she is tired or when I offer her the second breast!

Is she just full from the one boob? Or is she just too tired and can’t be bothered to feed from 2 boobs when tired?

Her nappies are still the same and she doesn’t seem hungrier than usual!