I cannot answer about weeks vs months.
A good estimate for size would be if you knew the size/weight of her parents.
What is the current weight and age?
As of Sunday she was 12 Weeks & 26.2 lbs @ 17"
I did get a chance to meet both of her parents. The sire was a good size. I estimated somewhere between 80-90 lbs. The dam also appeared to be a pretty good size for a female. My fiance thought the dam was high 70's, low 80's.
The problem with this is that the other day I saw another GSD that looked similar in size to the dam and the owner of that GSD said that she was 65 lbs. But then I look at my 65 lb Smooth Collie and he looks small compared to the GSD I saw at the vet and my puppy's Dam. So I don't know if I can trust my eyeball weight scale. Then there are her paws. Her paws look really. In fact, my 12 week old GSD's paws are the same size as my 1.5 year old Collie. And he is 65 lbs. So I am all over the place with estimating her adult size.
Obviously, we love her no matter whether she is big or small. This is purely a me thing. It's like a puzzle for me. I try to develop a formula that helps in estimating her size. I look at her growth trends and develop projections and try to get as close as I can to her final weight. Unfortunately, I didn't think to be as detailed with the tracking for my other two dogs as I have been with Citra. So this is my first trial doing this.
Fully grown, she will top out between 50 and 110, 50 and 100 if you do not let her become overweight.
Hope that helps.
I figured as much. Haha!!
Rest assured, if you get through the puppy crazies, and the adolescent insanity, and the first three heat cycles, she will be the perfect size for you and your family.
I'm aware of this. It doesn't have anything to do with me wanting her to be as big as possible. It is a puzzle for me. I just want to see how accurately I can forecast her adult weight. Whether she is 50 lbs or 100 lbs is irrelevant to me. I just enjoy the puzzle. :-)
too many factors to do what you are asking.
1) some dogs will get all of their height early and some will grow more gradually.
2) age when you spay/neuter will affect their growth rate
3) growth spurts come in cycles. You can literally wake up in the morning and say "HOLY COW!" because they've sprouted overnight.
GSDs grow in height until the growth plates close, around 18 months old. And then they add bulk until 3-4 years old. Exact timelines are influenced by bloodlines and individual metabolisms.
Dog A might get most of their height by the time they are 9 months old and only add a bit to that until 18 months. Some may advance slowly until closer to the end of their growth or may just go in fits and bursts the entire time. It would be highly unlikely to find any dog that grows at a regular rate all the way through.
A rule of thumb in the first few months is that there will be a steady weekly gain. One of my dogs gained a bit over 3lbs a week until 4 months old. Another gained 5 lbs a week.
After the first few months, Singe gained a LOT of height but not much in the way of actual weight, leaving him looking like a bobble head - it was amazing that he just didn't topple over.
We don't plan to have her spayed. Does leaving a female pup intact stunt growth or encourage it? Our goal is to have at least one litter with her. My sister has a friend that has a black GSD and we were thinking about possibly breeding them after a year or so.
By the way, I came home from work yesterday and I swore there was a different dog in my living room. I looked at her and she looked HUGE compared to when I had actually taken a good look at her the night before. I was amazed.