I think I already know what I need to do, just looking for confirmation and second opinions. Here's the background in a nutshell:
Last summer I went out of state for a couple weeks, friends of mine were taking care of the goats. Trixie was nursing her buckling so wasn't being milked. She sustained a serious udder injury that went unnoticed because she was on pasture and not being milked, and my friends were inexperienced (not really their fault). By the time I came home and found it, her udder was extremely infected and the buckling had stopped nursing. We treated her with penicillin, she had already stopped producing milk.
We decided to keep her and breed her one more time since she is the best milker we have and very well put together, hoping that she would have a doeling this year.
Yesterday, she had triplet doelings


Not much of a surprise, but today her udder is very hard. There is some milk but not much, the kids have been nursing. They all got colostrum, her udder was not hard yesterday after she kidded.
What would you do? Is there any chance that she could still recover and be a viable dairy goat, or is treating her likely to be a lot of time and money spent for nothing? As much as we like her, we are prepared to cull her tomorrow morning and bottle raise her 3 girls if that is the most realistic option.
Would really appreciate some outside opinions, thanks
EDIT: should also mention she is 7 years old