My 5mo is down with a flu. He's only drinking 35% of his usual milk intake. Rejects milk for later half of the day. Shld I be worried ?

The blocked nose provably makes him feel uncomfy and therefore doesn't want to drink. You can use saline nasal spray (sterimar) to squirt in his nose and loosen the gunk. If you are breastfeeding, squirt some breast milk into his nose as breast milk has antibacterial properties. Watch number of wet nappies as well, as an indicator of hydration. Aim for 5-6 wet nappies still