Activity needs are dramatically different here. The Labrador Retriever has very high energy (5/5) and needs very high exercise (5/5) — think long runs, hiking, or agility courses.

If you hate vacuuming, this matters. The Labrador Retriever's 4/5 shedding level means daily fur management is part of life.

These two breeds look nothing alike. The Labrador Retriever is a large breed at 25–36 kg (55–79 lbs) and 55–62 cm (22–24 in), while the Shih Tzu is a small breed at just 4–7 kg (9–15 lbs) and 20–28 cm (8–11 in).

Labrador Retrievers from the Sporting group carry a friendly, outgoing and active personality, shaped by their heritage as sporting dogs. Shih Tzus, belonging to the Toy group, are affectionate, outgoing and happy — reflecting their own distinct breeding history.

If you're a first-time dog owner, this is critical. The Labrador Retriever's trainability score of 5/5 means it responds well to basic positive reinforcement and learns household rules fast.

The Labrador Retriever has a slight edge with children (5/5 vs 4/5). Both breeds can do well in families, but the Labrador Retriever's friendly temperament gives it a small advantage around young kids.

Lifespan is a near-tie: the Labrador Retriever lives roughly 10–13 years while the Shih Tzu averages 10–16 years. Neither breed has a clear longevity advantage, so other factors should drive your choice.

Purchase prices are in the same ballpark: $800–$2,000 for a Labrador Retriever and $500–$2,000 for a Shih Tzu. The initial investment won't differ dramatically between these two breeds.