DS is 2.3, on Sat went off food, still drank water/milk but had large glass of fresh orange juice (hasn't liked it before)...later on had an explosive nappy (which I thought was due to juice) but then started a temp. Temp was gone Sunday but still off food, seems thirsty drinking lots of water, but has had 1/2 funny nappies and is v tired and snuggly..... I thought it was gone yesterday afternoon but he woke today cranky and tired and has slept lots today...just doubting myself as to whether its virus/treat at home or something else....a friend mentioned molars....? Any insight/experience appreciated