Hi thanks everyone for your speedy replies! I'm not sure if it is molars or not, he seems to go through phases when i think he is teething, and he tells me they hurt occasionally, but nothing seems to be happening. He seems to eat better at nursery, (which he did today thankfully) whether this is because he sees the others eating....the only meal we ever have as a family is breakfast unfortunately. I have asked what they do at nursery and it seems to be no different as to how I might encourage him. I don't feel he is using food to manipulate the situation.
Katie thanks for the reasurrance of your story! I think I might just have to ride this one out.