Of course they're targetable. You need to target them to kill them when needed. You can target others in use. I've shot one, got picked up and was being lofted away when my seagull was hit by crackling jade fire. Fortunately, that spell is so feeble that it wouldn't knock a feather out of a pillow. I think all that might be "fixed" is preventing the bird from stopping when you aren't the one doing the damage. Note to self: experiment after work.