Administering vitamin B3 to Pekin Duck

[LadyBubbles]

Put 1 ml over something really tasty he likes just enough treat so he gets full dose.

Hi! I currently am also suspecting a deficiency can I use poultry cell? I have nutritional yeast at 2 tbs per cup of feed now and we are now 3 days into duckling not wanting to walk that much and began water therapy 3 times a day yesterday.