My milk doe won't always finish her grain. She's a large Nub/Swiss, and I give her a small coffee can 2x per day at milking. Before she kidded I was feeding her the same grain the previous owner fed, now she's on Goat Chow + COB. Why would she not be finishing her grain? Do goats ever get ulcers? She does have baking soda, mineral, and salt & free choice alfalfa hay.