Increasing milk

[Redeemed98]

I have a Nubian doe that was giving about a gallon of milk per day. About a month ago she had diarrhea for a few days. I figured she must have eaten something that didn't agree with her as everything was beginning to come into bloom around that time. Anyway she began to decrease in milk.I assume she got a little dehydrated and this caused the decrease. She's giving a little more than a quart less per day.
I decided 2 weeks ago to switch her feed back to what her previous owners were feeding which is the noble goat to make sure she is getting enough protein. I was feeding her oats and alfalfa pellets. She still gets the pellets throughout the day as well.she still has not increased any yet. It may take more time but I was wondering if there is anything else I can do to help increase production. I milk pretty close to every twelve hours. Would milking a third time each day cause her body to feel it needs to produce more milk?