My DD stopped eating solids entirely for around a week when we were having teeth/cold issues. She went back to it when she was done. I would worry more about liquids at this point - sounds like he's getting them all one way or another. You can try using a nasal aspirator (one of those bulb things that sucks snot out of their noses) before giving him his bottle so he can breathe more easily while eating. You can also try pain meds if you think it's the teeth. If he just got his bottom two, maybe the top two aren't far behind? I know those were the worst for Katie. I've heard some moms say that their LOs did better with finger food during teething - you can try things like cold soft fruits and veggies (the cold will feel good on his gums).
Basically, you're not alone in this! He will start eating again when whatever is bothering him feels better! Oh, and if he's got a cold, my ped told me that they are less hungry then b/c all the mucous running from their noses fills up their tummies (gross I know). If he's acting in a way that worries you, or if he won't take enough fluids, give your doctor a call, just for some peace of mind if nothing else.
Hmmm...I feel like I just completely rambled on, so hope this helps!
