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🐕

Mastiff

giant

Massive but mellow guardians with an affectionate nature.

Keep lineage notes tidy with GenogramCraft right alongside your growth tracking.

Adult Weight
120-230 lbs
Lifespan
6-10 years
Temperament
Dignified, Protective, Docile
Exercise
30 minutes of gentle walks daily
Energy Level
Trainability
Shedding
Family Friendly

Growth Chart

Track Your Puppy

Loading growth chart...
AgeWeight RangeAverage
0 weeks
0 months
0 - 0 lbs0 lbs
4 weeks
0 months
15 - 28 lbs22 lbs
8 weeks
1 month
30 - 57 lbs43 lbs
12 weeks
2 months
44 - 85 lbs65 lbs
16 weeks
3 months
59 - 113 lbs86 lbs
20 weeks
4 months
74 - 142 lbs108 lbs
24 weeks
5 months
89 - 170 lbs129 lbs
28 weeks
6 months
98 - 188 lbs143 lbs
32 weeks
7 months
102 - 195 lbs148 lbs
36 weeks
8 months
105 - 202 lbs153 lbs
40 weeks
9 months
109 - 209 lbs159 lbs
44 weeks
10 months
113 - 216 lbs164 lbs
48 weeks
11 months
116 - 223 lbs170 lbs
52 weeks
12 months
120 - 230 lbs175 lbs

Developmental Milestones

0-2 weeks

Physical Development
Eyes and ears closed, depends on mother
Behavioral Development
Limited movement, nursing

2-4 weeks

Physical Development
Eyes and ears open, teeth begin to emerge
Behavioral Development
Starts walking, exploring

4-8 weeks

Physical Development
Weaning begins, rapid growth
Behavioral Development
Socialization with littermates, play behavior

8-12 weeks

Physical Development
Baby teeth fully in, growth continues
Behavioral Development
Critical socialization period, fear imprint period

3-6 months

Physical Development
Adult teeth coming in, puberty begins
Behavioral Development
Testing boundaries, second fear period

6-12 months

Physical Development
Sexual maturity, growth slowing
Behavioral Development
Adolescence, energy peaks

12-18 months

Physical Development
Reaches adult size, growth plates close
Behavioral Development
Mental maturity developing

Age Progression Gallery

See how Mastiffs develop from puppies to adults

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8 Weeks

Puppy - Early socialization stage

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3 Months

Growing fast - Learning phase

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6 Months

Adolescent - Energetic stage

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Adult

Full grown - Mature and stable

Note: Photos shown are representative placeholders. Individual dogs may vary in appearance based on genetics, diet, and care.

Care Requirements

Grooming

Low – weekly brushing, drool management

Exercise

30 minutes of gentle walks daily

Common Health Issues

  • • Bloat
  • • Hip dysplasia
  • • Heart disease