Are rowan berries poisonous to dogs?

Raw rowan berries are toxic to dogs due to high concentrations of parasorbic acid. The raw berries are also toxic to humans, but humans can eat cooked rowan berries.

Dogs can eat some fruits and berries safely in small quantities. Safe fruits include apples, bananas, blueberries, cranberries, watermelons, strawberries, raspberries, blackberries, kiwi fruits, pears, pumpkins, cantaloupe and oranges. Too much of any fruit can cause digestive upset, and individual animals may have adverse reactions to any given fruit. It is best to introduce fruits in small amounts. Dogs should not be given seeds or pits and should not be allowed to eat grapes, avocados or figs.