Hi all I was just wondering if it is normal for...

Hi all I was just wondering if it is normal for babies when they start to teethe, for them to go off their food? Jett is usually a great eater on solids. He was having around 2-2 1/2 tins, 2-3 times a day of food each meal and now he wont even finish 1 tin a day! Ive tried giving him different types of food but still he wont eat that much. Is this normal? He is having plenty of bottles so Im not too worried about it but, I was just wondering if this has happened to anyone else? Thanks