Hello,
My lo (8 months) has really gone off solid food and it is related to his teeth - it has been going on for about 6 weeks now. It started about 2 weeks before his first tooth appeared, and he now has 3 ( and a 1/2!) perhaps it could be that? He has had little solid food since then and is still gaining weight and very healthy.
I have been assured by a Consultant Paediatrician that this is completely normal - and babies can be sustained until at least 12 months on milk alone if necessary (especially breastmilk as it changes in consistency to what they need, when they need it, v. clever!) so don't worry!
Charlotte