Help very bloated, won’t eat, butterscotch pudding out the rear

[greybeard]

It's the feeding

https://vet.uga.edu/news/view/enterotoxemia_in_sheep_and_goats
http://www.tennesseemeatgoats.com/articles2/enterotoxemiaaka.html

Enterotoxemia, also known as Overeating Disease or Pulpy Kidney Disease, is caused by the bacterium clostridium perfringens. There are many types of C. perfringens, but types C and D are what are usually seen in goats in the USA. Type C is more often found in young kids and type D is more common in adult goats. Goat raisers are fortunate that two of the few medications made specifically for goats are a vaccine to prevent Types C&D clostridium perfringens and an anti-toxin to give when the problem already exists.

Enterotoxemia is primarily a management-caused disease. Feeding too much carbohydrate-rich feed (processed grains) creates an environment of undigested starches in the rumen and intestines where C. perfringens toxins can flourish. Other causes can be feeding very lush pasture or baked goods such as bread. Goats breaking into a feed bin and eating their fill often results in Overeating Disease. Sudden changes in feed or pasture or in how or when you feed can cause Enterotoxemia. The pH of the rumen becomes acidic, rumen contractions slow down, toxins go systemic (throughout the goat's bloodstream), damaging blood vessels in the brain (become neurotoxic), and killing the goat. All changes in feed, hay, and pasture must be done slowly and over multiple days to avoid shocking the rumen and causing sickness.

The last part applies to pretty much any kind of animal (and humans).