Have you tried dream nursing at night? Baby is asleep, but they will often latch on without waking and get in a solid feeding (helps with those distracted babies). If you try to get in a couple of extra nursings at night (do you cosleep? that will make it easier) it could help.
If introducing solids is something you want to continue with, back off of the rice cereal and try higher fat items like avocado. Mix in some breast milk if they don't like the taste.