As they grow out, the tips will be hard, but the base of the feather will still be fleshy inside the quill. It's okay to cut the tips, but just be careful about not clipping it against the skin, or it will bleed.
Blood feathers are new ones coming in, where the shaft is still growing. You've seen before where a chicken has had a growing tail feather picked or something and it's bleeding? The quick is still supplying the feather blood and nutrients while it's growing, so if it get's pecked or cut, it...