Can Ferrets eat ...?
Food safety index

Parsley is not acutely toxic to ferrets in the way chocolate or grapes are to dogs, but it poses meaningful risks that make routine feeding inadvisable. The herb contains furocoumarins and a relatively high oxalate load, and ferrets' obligate-carnivore digestive systems are genuinely ill-equipped to handle plant matter. Small, infrequent nibbles are unlikely to cause a crisis, but parsley should not be offered as a regular treat or dietary supplement.

Cow's milk is not toxic to ferrets in the classical sense, but most adult ferrets are functionally lactose intolerant, meaning even small amounts can cause significant gastrointestinal distress. Ferrets are strict obligate carnivores whose digestive systems are optimised for animal protein and fat — not the lactose sugars found in mammalian dairy. Regular milk should be avoided, though purpose-made lactose-free or kitten milk replacers carry much lower risk in tiny amounts.

Plain, fully cooked pork can be fed to ferrets in moderation as a protein source, but significant caveats apply. High fat content, seasoning, processed forms, and raw pork carrying Trichinella spiralis all introduce real risk. Owners who choose pork should select lean, unseasoned, thoroughly cooked cuts and treat it as an occasional item rather than a dietary staple.