Canine Developmental Benchmarks

Puppy Growth Charts by Breed Size

Comprehensive developmental milestones and adult weight completion benchmarks derived from the landmark WALTHAM canine growth study (Salt et al., 2017).

Growth Milestone Comparison Across Dog Sizes

Notice how the timeline to reach 50% and 100% of adult weight doubles from toy to giant breeds:

Size Category	Typical Adult Weight	50% Adult Weight	Full Physical Maturity
Toy Breeds	< 12 lbs (< 5.5 kg)	12 – 14 weeks	8 – 10 months
Small Breeds	12 – 25 lbs (5.5 – 11 kg)	14 – 16 weeks	10 – 12 months
Medium Breeds	25 – 50 lbs (11 – 23 kg)	16 – 18 weeks	12 – 14 months
Large Breeds	50 – 90 lbs (23 – 41 kg)	20 – 22 weeks	14 – 18 months
Giant Breeds	90+ lbs (41+ kg)	24 – 28 weeks	18 – 24 months

Toy Breeds

< 12 lbs (< 5.5 kg)

Full maturity: 8 – 10 months

Common Breeds: Chihuahua, Yorkshire Terrier, Pomeranian, Maltese, Toy Poodle

Clinical Note: Rapid metabolic rate; prone to juvenile hypoglycemia if meals are spaced too far apart.

Age	Male % of Adult Weight	Female % of Adult Weight
8 wks	31%	34%
12 wks	44%	47%
16 wks	59%	61%
20 wks	71%	74%
24 wks	81%	83%
32 wks	94%	95%
36 wks	100%	100%

Small Breeds →

Small Breeds

12 – 25 lbs (5.5 – 11 kg)

Full maturity: 10 – 12 months

Common Breeds: French Bulldog, Beagle, Miniature Schnauzer, Dachshund, Boston Terrier

Clinical Note: Compact musculature and rapid growth; transition to adult food around 10–12 months.

Age	Male % of Adult Weight	Female % of Adult Weight
8 wks	25%	28%
12 wks	38%	42%
16 wks	52%	56%
20 wks	66%	70%
24 wks	78%	81%
32 wks	91%	93%
44 wks	100%	100%

← Toy Breeds

Medium Breeds →

Medium Breeds

25 – 50 lbs (11 – 23 kg)

Full maturity: 12 – 14 months

Common Breeds: Australian Shepherd, Border Collie, Bulldog, Pembroke Welsh Corgi, Cocker Spaniel

Clinical Note: Standard growth curve inflection; reaches 50% adult weight near 16 weeks.

Age	Male % of Adult Weight	Female % of Adult Weight
8 wks	20%	22%
12 wks	34%	37%
16 wks	49%	52%
20 wks	63%	66%
28 wks	81%	84%
40 wks	94%	96%
52 wks	100%	100%

← Small Breeds

Large Breeds →

Large Breeds

50 – 90 lbs (23 – 41 kg)

Full maturity: 14 – 18 months

Common Breeds: Labrador Retriever, Golden Retriever, German Shepherd, Boxer, Standard Poodle

Clinical Note: Requires controlled calcium/phosphorus large-breed puppy food to prevent orthopedic disorders.

Age	Male % of Adult Weight	Female % of Adult Weight
8 wks	16%	17%
12 wks	28%	30%
16 wks	42%	45%
24 wks	64%	67%
36 wks	83%	86%
52 wks	95%	97%
65 wks	100%	100%

← Medium Breeds

Giant Breeds →

Giant Breeds

90+ lbs (41+ kg)

Full maturity: 18 – 24 months

Common Breeds: Great Dane, Mastiff, Saint Bernard, Bernese Mountain Dog, Newfoundland, Cane Corso

Clinical Note: Prolonged growth plate open period; avoid high-impact jumping and over-supplementation.

Age	Male % of Adult Weight	Female % of Adult Weight
8 wks	12%	13%
12 wks	22%	24%
16 wks	34%	37%
24 wks	54%	57%
36 wks	73%	76%
52 wks	88%	90%
80 wks	100%	100%

← Large Breeds

↑ Back to Overview

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