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Depends a lot on breed....most pups get their growth spurt by 9 months, then finish at 18 months. Large breeds continue growing until about 2 years. Mastiff breeds, Old English Mastiff, Bull Mastiff, Tibetan, Nebolish, Saint Bernard, Fila, etc... grow until they are 3 years old. Nutrition is important during their growth period.

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16y ago
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14y ago

Most dogs are fully grown at about 1 year of age.

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16y ago

Gernerally accepted that at a year a dog has reached maturity.

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9y ago

The time a dog stops growing varies between breeds. Dogs are considered full grown at 1 year old but some are done growing before that and some might not be full grown until 2 years of age.

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11y ago

Usually dogs mature when they are 2 years old. But sometimes dogs mature at a different age. ( like humans ) It just depends on the dog.

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16y ago

between 3-10 months of age

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11y ago

never

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Q: What age is a dog in its prime?
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