Is European Hazel 'Cosford' toxic to dogs?

No — european hazel 'cosford' is listed by the ASPCA as non-toxic to dogs. It is a sensible choice for a home with a dog; a curious nibble will not poison them, though no plant is meant to be eaten. ASPCA does not flag European hazel (Corylus avellana) foliage as toxic, and the species is not on its toxic plant lists; the plant itself is treated as non-toxic to cats and dogs. The main pet risk is the nuts: whole hazelnuts can cause choking or GI obstruction, are high in fat (pancreatitis risk in dogs), and moldy fallen nuts may carry tremorgenic mycotoxins, so clear dropped nuts.

Yes — the ASPCA lists european hazel 'cosford' as non-toxic to dogs and dogs. A dog that chews a large amount of any foliage can still get a mild, brief stomach upset, so discourage grazing, but it will not be poisoned.

The ASPCA classification Growli uses applies to both cats and dogs: European Hazel 'Cosford' is non-toxic to cats as well. See the full european hazel 'cosford' pet-safety guide for both species.

Reliable ASPCA non-toxic picks for a dog home include spider plant, calathea, parlor palm, peperomia, and most true ferns. Browse the best dogs-safe plants list to check more before you buy.