For myself, I don't need them.  But, if others find it easier, then go for it.

I would rather have you slaving away at the animals to get them released.  I love your animals, they are the most realistic of all the animals out there.  I try to use them in any render I do (sometimes they are not practical, when was the last time you saw a goose in a living room?).  But I have really increased my outdoor scenes just so I can use them.