You mostly do the roos for showing. Game birds have to be dubbed to show.
You can use a sharp pair or siccors. Yes they will bleed. I dont put anything on mine after I dub them, but you can put a little blood stop powder on them if you want.
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They do bleed some but if you dubb them when there blood is in there feed it ain't has bad. I just use meat shears to dubb them but some people have shears made for dubbing. You can put flour on there combs to help stop the bleeding.