Question: how long will it take for 5 day old duckling to be able to walk again (i've noticed him weak today, not walking. Was fine yesterday) Long story: This poor Ducking (about 5 days old now) was found close to death. Been looking after him (her?) and he's been doing better. Happy, chirpy and active. I was feeding a duckling feed and he was fine yesterday but I noticed today his legs are very weak. I checked online and noticed I am not providing enough niacin. Long story short I've just given him his first feed with the correct amount in his water. How long will it take for it to work and for my poor baby to feel better again and be able to walk?