Hey there Mukta,
Just to let you know, we've been in the same boat a bit. She had a really nasty cold and basically gave up solids alltogether (she'll be 10mo in a week). It's been 10 days since she started getting sick, and today was really the first day she's taken her bottles normally, and even took a little bit more solids. DD too would only eat cheerios while sick. She wouldn't let me spoon feed her, but would only throw her finger foods off the high chair tray. She's been to the dr. twice, and didn't gain any wait in that 10 day period (but didn't lose any thank goodness) and the nurse told me it was ok because babies sometimes loose weight while they are sick. Have you talked with your dr? Do you have a safe feeder? They are little mesh bags attached to plastic handles. I can put bigger chunks of food and dd can gnaw on them to soothe her gums if you think some of this is related to teething. I've been known to put an ice cube in it and let her gnaw as well. I hope he starts to feel better really soon!!!!
~~~~~~~~~`HUGS~~~~~~~~~~~~