My child has an eating disorder. We started to notice there was a problem at 7 months ... but he was adopted at 7 months. At 14 months we ended up in the feeding clinic at Childrens. We was not losing wait, but he didn't gain hardly any weight from 7 to 14 months. But he was force fed in an orphanage so he was pretty heavy to begin with but ended up being really really skinny at 14 months.
Is your child maintaining his weight curve? If you think there is a problem, I would buy an infant/toddler scale and weight him every week along with length and start plotting it.
My child has infantile anorexia and there is a sleep component to it too.
I think ask your pediatrician, but 7 months may be too early for feeding solids for your baby. I think I tried that at 8 months, no interest. So ask your pediatrician for guidance on that.
http://www.amazon.com/When-Your-Child-Wont-Eats/dp/1475912455/ref=sr_1_2?ie=UTF8&qid=1400260343&sr=8-2&keywords=chatoor
Dr. Chatoor is co-director of the Feeding Clinic at Childrens Hospital. This is something to read to get to know different areas of eating disorders. If his weight does not follow a curve (like falling from 25% to 10%), then you should pursue a feeding clinic.
I'm not doctor, just a parent dealing with a child with an eating disorder. But the scale really helps you have a history, but remember you need weight, and height.