Unlikely to be the season causing that kind of mess - is she in pain, straining and generally unwell? Off her food? If yes - could be enteroxeamia. Needs treating fast - very fast.
Is she on a vaccination regime? Goats need boostering with clostridial vaccines every 6 months, and it is better to use Lambivac rather than Heptavac.
If she is otherwise fine - what is her worm status? When and with what was she last wormed? Is she sharing a field with sheep? Any new sheepy arrivals recently?
So could be many things but unlikely to be because she is in season. I have never seen that.