Chihuahua vs Rat Terrier: side by side
| Chihuahua | Rat Terrier | |
|---|---|---|
| Size | Tiny | Small |
| Weight | 1.5–3 kg (3–6.5 lb) | 5–11 kg (10–25 lb) |
| Height | 15–23 cm (6–9 in) | 10–18 in (25–46 cm) |
| Lifespan | 12–18 years | 12-18 years |
| Exercise | 30 per day | 60–90 per day |
| Shedding | Low-Moderate | Moderate |
| Temperament | Devoted to their chosen person, suspicious of the rest of the world. Small-dog syndrome — being allowed to sna | AKC temperament summary: inquisitive / lovable / friendly. Adaptability 4/5, affection with family 5/5, openne |
The differences that actually matter
- Rat Terrier is the bigger dog. Adults run 5–11 kg (10–25 lb) against 1.5–3 kg (3–6.5 lb) for the Chihuahua.
- Rat Terrier needs more exercise. Rat Terriers are listed at 60–90 per day a day against 30 per day for the Chihuahua.
- Shedding: Chihuahua is rated low-moderate, Rat Terrier moderate. The Rat Terrier is the one that leaves more fur around the house.
- Lifespan: Chihuahua 12–18 years vs Rat Terrier 12-18 years.
- Trainability: Chihuahua — Moderate — clever; housetraining takes patience. Rat Terrier — Excellent — eager to please, picks up new cues fast
- First-time owners: Chihuahua — Yes, if handling rules are respected. Rat Terrier — Yes — forgiving of beginner mistakes.
So which one should you get?
Pick the Chihuahua if you want: Homebodies who want a portable companion and will do daily dental care..
Pick the Rat Terrier if you want: Active people who genuinely enjoy daily exercise; commitment to socializing a natural guardian..
Neither is the "easier" option across the board — they fail in different ways. Be honest about which failure you can live with.
Health: what each one is prone to
Chihuahua: Dental disease (near-universal without care); Patellar luxation; Hypoglycemia in puppies; Heart murmurs
Rat Terrier: Hip dysplasia — confirm breeder screens breeding stock (OFA/PennHIP); Patellar luxation (slipping kneecap); Eye disorders — reputable breeders screen annually; Heart conditions — cardiac screening recommended
Ask any breeder or rescue for the health testing relevant to these conditions before you commit. This page is educational — not veterinary advice.
Frequently asked questions
What is the difference between a Chihuahua and a Rat Terrier?
Rat Terrier is the bigger dog. Adults run 5–11 kg (10–25 lb) against 1.5–3 kg (3–6.5 lb) for the Chihuahua. Rat Terrier needs more exercise. Rat Terriers are listed at 60–90 per day a day against 30 per day for the Chihuahua. Shedding: Chihuahua is rated low-moderate, Rat Terrier moderate. The Rat Terrier is the one that leaves more fur around the house. Personality differs too: the Chihuahua is devoted to their chosen person, suspicious of the rest of the world. small-dog syndrome — , while the Rat Terrier is akc temperament summary: inquisitive / lovable / friendly. adaptability 4/5, affection wit
Which is bigger, a Chihuahua or a Rat Terrier?
Rat Terrier is the bigger dog. Adults run 5–11 kg (10–25 lb) against 1.5–3 kg (3–6.5 lb) for the Chihuahua.
Is a Chihuahua or a Rat Terrier better for first-time owners?
First-time owners: Chihuahua — Yes, if handling rules are respected. Rat Terrier — Yes — forgiving of beginner mistakes.
Which sheds more, a Chihuahua or a Rat Terrier?
Shedding: Chihuahua is rated low-moderate, Rat Terrier moderate. The Rat Terrier is the one that leaves more fur around the house.