I bred my doe on the 14th of this month. Its been 15 days since then. I noticed my doe this morning have mouthfuls of hay in her mouth and trying to "dig" (on the plywood) so I assumed she's building a nest. Therefore, I put in a ton of Timothy hay (I have a cage built like a nesting box which she can go in and out of). Is it normal for her to start building this early? Thanks.