A dog is a creature commonly used as a pet on the planet Earth. In 1998, Colonel Jack O'Neill gave one to Cassandra Fraiser, telling her that "we have a rule here on Earth; every kid has got to have a dog." (SG1: "Singularity")
- Oscar; Senator Robert Kinsey's dog
- Sedgewick; Dr. Elizabeth Weir's dog
- Shih Tzu; Sal's dog.
- Yorkie; Richard Woolsey's dog
- Cassandra Fraiser's Dog, Cassandra Fraiser's Dog
- Saint Bernard
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