Ok, so I'm very new to ducklings. We have 2 Pekin and 2 Rouen that are 3 weeks old. I' feeding them chick grower 18% as directed by the duck breeder. Yesterday, I noticed a Rouen had what looked like a head tilt or like it was looking down at the ground with 1 eye. I thought nothing of it because it' eating, drinking, playing and swimming normally. Today it's still the same way so I looked up what it could be and saw where someone had theirs at the vet and was told it was wry neck. They suggested getting actual Duck pellets and aaid they were using Berocca. I can get pellets tomorrow, but not today. I see I can get Berocca at Walgreens which is right down the road, but my question is how do I give it and how much? Or is there another vitamin I can get at Walgreens that would work better? Thanks in advance!