We have had both. I prefer welsh because they are less flighty and much prettier. I actually recently rehomed all of my khakis (I had like 18). All of my ducks have been daily layers regardless of breed. The khaki eggs I got were the same size or smaller than my chicken eggs so they never really impressed me. One pro to khakis over welsh is they eat less, lol!
Also as far as breaking up a flock, as long as they can be seperated in pairs or more, they will be fine.
Also as far as breaking up a flock, as long as they can be seperated in pairs or more, they will be fine.