+9 votes
by

2 Answers

0 votes
by
Newfoundlands are slow-growing, so it'll take over two years for them to reach their full size. A Newfie's basic framework will be completely in place at around 18 to 20 months old. But he will not reach his full muscle mass and weight until he is two years old.
–2 votes
by
  • What age is a Newfoundland fully grown? Very large dogs like Mastiffs , Great Pyrenees , Saint Bernards and Newfoundlands take the longest to reach full size. Their basic framework is in place by about 18 months old, but it can take until age two or three for them to reach full weight and muscle mass. Click to see full answer.

Categories

653k questions

2.7m answers

0 comments

50.2k users

Most popular tags

Welcome to The Dog Visitor Q&A [2022], where you can ask questions and receive answers from other members of the community.
...