All I know we use ivermectin on all our animals, and we have a true menagerie. Used as a preventative wormer the animals stay healthy.

https://www.barnhardt.biz/2021/06/03/ummm-so-ivermectin-might-literally-be-a-cure-for-cancer-not-satire-deadly-serious-like-pancreatic-cancer-serious/

I've heard mebendazol/fenbendazole may help as well.

What are these antiparsitics doing in the body to help fight cancer?