They rarely get it. My only encounter with it was when Chrissy had her foot exposed all night (thigh injured, couldn't pull her web under her) in -21c weather.Can't web feet get frostbite?
I'd suggest starting with threeish ducks, to get to know what you need to do for your climate etc. For me, the issue was handling winter water. Once I figured that out I ramped up my dux count by a lot, lol. Of course, you could always just start big and figure out issues on a mass scale.What should I NOT DO?

I really haven't run into much so I don't have much to say on that part. I have only kept ducks "officially" for about a year and a half... have had several before then but I treated them same as chooks. I didn't know much about them.