My son has lost 0.1kg in 3 weeks. He was weighed just before 7 months and was 8.6kg (just below 75th percentile). Today he weighs 8.5kg (just above 50th percentile). He will be 8 months on 23rd.

He has more or less had the cold for the last month. His milk intake has been really poor. Took him to GP. Ears, throat, chest all clear. Also cut 2 teeth and he's now army crawling so he's more active. Should I worry he's not gained a single oz in nearly a month?