What size are your ducks? I know you said that they are Call ducks, but your boy isn't that tiny. Ducks that are a couple of pounds can't fly, so if yours are a couple of pounds, maybe you don't need to clip their wings.
If you do decide to clip a wing on each of them the idea is just to clip the large Primary feathers that are on the outer half of the wing. The last 10 feathers on the wing. If you think your boy might fly then I'd do his wing too. I don't think that his slow feather growth will matter at all, from a wing-clipping perspective.
If you do decide to clip a wing on each of them the idea is just to clip the large Primary feathers that are on the outer half of the wing. The last 10 feathers on the wing. If you think your boy might fly then I'd do his wing too. I don't think that his slow feather growth will matter at all, from a wing-clipping perspective.

