If mild,avoid unnecessary medicine and just give steam inhalations for cold and cough and decongestant nasal drops for nasal block or increased cough on lying down. Use paracetamol for fever and repeat every 4 hours if required. As for appetite,STOP breastfeeds,give just 2 top milk feeds using a glass or spoon and katori and 4 solid meals a day including curd and Banana in the diet in addition to whatever you prepare at home. Deworm him using syp bandy plus 5 ml as a single dose.