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Story summary
- Elyssa, a foster caregiver, adopted a one-pound Chihuahua puppy named Zero who grew to 18 pounds.
- A veterinarian suspects Zero may be a corgi-heeler mix, explaining his unusual size.
- Instagram viewers praised Zero's charm, with comments noting his surprising growth.
- Research shows breed designations in shelters are often inaccurate, with only 5% genetically purebred.
- Experts recommend shelters prioritize temperament over visual breed identification.
