Yeah well, I wouldn't get overly excited on the efficiency of animals 'medicine'. Just look at human medicine 200 years ago and all those herbs and crap did little more than placebo, when they weren't actively harming, but I suppose animals aren't stupid enough to ingest calomel.

Real medicine like antibiotics doesn't work in "raw form". Can't eat lots of Danish blue cheese and fight of a pneumonia or throat infection with penicillin. Leaving aside the difficulty of isolating and extracting enough pure substance, antibiotics need a very technically advanced (from a chemistry point of view) agent to make them last enough in the body to be useful.

Again, it's entertaining to see animals "self-medicate" but if this stuff worked reliably, humans would have picked it up looong before modern medicine.