If you're just feeding them to the dogs, you could behead, (or cut the throats, dogs would be happy to eat the heads, too) scald and just do a rough pluck, and as for gutting, just open the abdomen, pull out the actual intestines, and leave the rest intact. Throw them into empty bread bags and freeze. The dogs won't care if they have a few feathers, they like the innards, and don't even care if they're a little freezer-burned. You don't have to worry about getting a good bleed-out, either.
The only reason I'd go ahead and remove the intestines, is so I wouldn't have poop in my freezer with people food.
The only reason I'd go ahead and remove the intestines, is so I wouldn't have poop in my freezer with people food.