Most wild animals have worms. Dogs would have worms if it weren't for periodic dewormer treatments for instance.
Why does this disqualify racoons from being domesticated?
Why does this disqualify racoons from being domesticated?
To use your example, dogs and hookworms. https://todaysveterinarypractice.com/parasitology/drug-resis...
(Because, releasing billions of cats and dogs would leave them starving to death)