What do you think does his legs seem to be weak? you mentioned he would lay down a lot? It sure wouldn't hurt to get him started on the duck feed or get a supplement till your finished with your current feed. When one is already showing problems we rec Liquid B Complex because it works super fast. You can get it at TSC in cattle section or Walmart or any place that sells human vitamins the TSC is more concentrated so you will use less only 1 ml per day the human they will need 3 ml daily. Given orally @CayugaJana Puts it over meal worms for her ducklings. I'd give it to both your ducklings. They really need it till 10 weeks old that is when they are doing the most of their growing.
