We got our first female Newfoundland at 11 weeks and she was about 32 pounds. She gained almost exactly 2.5 pounds every WEEK from then on, until about 11 months. At 12 months her weight gain slowed a lot, but she continued to gain at a steady pace until her 2nd birthday, when she weighed in at her adult weight of 132 pounds (yes she is big for a female, but has the height and length to support the weight). Now a male can grow and/or get another 15 to 25 pounds larger than our female. But Newfoundlands should never really gain more than 3 pounds per week. Because the bones and joint development cannot keep up proportionately if they gain too much too fast. And that is bad for a Newfie...carrying too much weight for their size is bad on hips, elbows, and all other joint development. Each dog will vary some, but a 5 month old male on average should be about 55 to 65 pounds I believe.
Answered by jlaw3 - 1/23/2014 2:53:16 PM