I am never going to post about Betty's indigestion again. Everytime I post that she is fine, she makes me a liar. She threw up her entire lunch and then begged me for food. Then she pooped out on the terrace which confirms that the pooping I attributed to Zoey was really Betty's. I apologized to Zoey and she said 'no prob'. Well, actually, she just head nudged me for a really long time.
I waited a while before filling Betty up again. I hope it lands in the litter box later but I am glad I pulled the trigger on that new spot cleaner.