Are Cleveland pear trees berries poisonous to dogs?

Cleveland pear trees (Pyrus calleryana) produce small fruits that are technically classified as berries, but they are not considered highly toxic to dogs. While ingestion may cause mild gastrointestinal upset, such as vomiting or diarrhea, they are not lethal. It's always best to monitor your dog and consult a veterinarian if you suspect they have eaten any part of the tree or its fruit.