Toy Fox Terrier Puppy Weight Calculator

Calculate the adult weight for your Toy Fox Terrier. Just type your puppy’s current weight and age, and see how big your puppy gets.

Toy Fox Terrier Breed Profile

Breed Overview

The Toy Fox Terrier is a lively, intelligent, and affectionate toy breed developed in the United States. Descended from the larger Smooth Fox Terrier, the Toy Fox Terrier was bred down in size while retaining its athleticism and alert personality. This small but spirited dog is both a companion and a capable working breed, excelling at agility, obedience, and even pest control.

Toy Fox Terriers are confident, playful, and loyal, making them excellent family pets for households that can match their energy. Despite their small size, they are bold and adventurous, often forgetting how tiny they are compared to bigger dogs.

Size Category and Why Growth Tracking Matters

The Toy Fox Terrier belongs to the toy breed category, with adult dogs typically weighing between 3.5–7 lbs. Because of their small size, their growth period is shorter than larger breeds, and they reach adult weight much sooner. Tracking their growth is especially important to ensure they’re not underweight (which could make them fragile) or overweight (which puts stress on their joints and heart).

Toy Fox Terrier Growth Chart & Weight Ranges

Age	Average Male Weight (lbs)	Average Female Weight (lbs)
4 weeks	0.5 – 1	0.4 – 0.9
8 weeks	1 – 1.5	0.8 – 1.4
3 months	1.5 – 2.5	1.3 – 2.2
4 months	2 – 3	1.8 – 2.8
6 months	2.5 – 4.5	2.3 – 4
9 months	3 – 5.5	2.5 – 5
12 months	3.5 – 7	3 – 6.5

Note: Males often grow slightly larger than females, though in this toy breed, the difference is usually only 0.5–1 lb.

How Much Bigger Will My Toy Fox Terrier Puppy Get?

Toy Fox Terriers grow quickly compared to medium and large breeds.

• Most puppies reach 50% of their adult weight by 3 months.
• By 6 months, they are typically 80–90% of their adult size.
• They usually reach their full adult weight by 9–12 months.

Rule of thumb: Double your Toy Fox Terrier’s weight at 12 weeks to estimate their adult size. For example, a 2 lb puppy at 3 months will likely weigh about 4 lbs fully grown.

Unlike giant breeds that grow for 18–24 months, Toy Fox Terriers mature much earlier, which is why careful growth monitoring in the first year is crucial.

Note: For more details on breed standards, see the American Kennel Club (AKC) profile.

Toy Fox Terrier Growth Tips

Nutrition

• Feed a high-quality toy breed puppy formula, which has the right balance of protein, fat, and calories for small dogs.
• Divide meals into 3–4 small feedings per day until 6 months, then transition to 2 meals daily.
• Avoid overfeeding — excess weight can strain their tiny joints and shorten their lifespan.

Exercise

• Toy Fox Terriers are energetic but due to their size, exercise should be moderate and safe.
• Short daily walks, play sessions, and indoor games provide plenty of activity.
• Avoid rough play with larger dogs or high-impact jumping to prevent injuries.

Health Watch

Growth-related and breed-specific concerns include:

• Patellar luxation (slipping kneecaps) – common in toy breeds if weight is not managed.
• Fragile bones – prevent falls or rough handling, especially during rapid growth phases.
• Dental issues – small breeds often have crowded teeth; introduce dental care early.