Plain air-popped is safe. Butter/salt/flavored are not.
Only plain air-popped.
A few plain kernels
Avocados contain persin, which can cause vomiting and diarrhea in dogs and is more toxic to cats. The pit poses a choking hazard.
Xylitol is extremely toxic to dogs. Even small amounts can cause rapid insulin release, leading to severe hypoglycemia and liver failure.
Chocolate contains theobromine and caffeine, which are toxic to dogs and cats. Darker chocolate is more dangerous.
Peanut butter is generally safe, but many brands contain xylitol. Always check the label.
Coconut and coconut oil are safe for pets. They contain medium-chain triglycerides (MCTs) that benefit skin and coat health.
Cheese is safe in small amounts, but many pets are lactose intolerant.