And symptoms can go on for months before any teeth actually appear!
We've all got colds here, and poor A found it difficult to sleep through all his snuffling last night as did I but I did get the first 2 hours with him in his crib, which is the longest he's gone in there.
We made up the cot at last too, and I put him in it while I got DD dressed this morning. He promptly fell asleep and I got a shower and managed to get lunch ready before he woke up.
Seconds- could it be that he's thirsty rather than hungry, due to the heat, so doesn't want the thicker formula and is getting mostly foremilk from you? Could explain the lack of appetite and green poos.