That's very interesting; thanks for sharing.Even though she was well fed that week, I saw her chewing black walnuts to bits many times. I looked it up, and black walnuts can apparently be affective against parasites like tapeworms.
Sure enough, this neglected dog tested negative for worms at the vet, which seemed unlikely. Could've been luck or a false result, but I always suspected she had been medicating herself with the walnuts. She didn't continue eating walnuts after we took her in and put her on a monthly preventative.
It led me to discover this paper https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9924796/
which is a review of lab-demonstrated (in vitro) anthelmintic plants, from 2022, which is very useful. (I note they used the bark of the walnut, not the nut cases, and they tried it on a type of earthworm rather than, say, a roundworm btw; as they conclude, more research needed, of course!)