I think as an addon to #7: fecal testing is required if you are unsure on if an animal is wild caught. Wild caught animals can exist with a parasite or bacterial load that can affect your other animals in entirely different ways.
I would even go so far as to treat with a antiparasitic as a precaution immediately after taking a fecal sample. Antibiotics are a bit more harsh and I would wait on a fecal culture there.