when do puppies reach their full adult size?
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Thread: when do puppies reach their full adult size?

  1. #1
    Junior Member carey's Avatar
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    when do puppies reach their full adult size?

    I have a 3 month old puppy. I was wondering at what age most puppies stop growing
    Carey~mom to Parker, Emma and Gabi
    and my 4 legged baby Stella

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    Senior Member ioreks_mom's Avatar
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    Re: when do puppies reach their full adult size?

    i heard that puppies stop growing up at around 8 months and start filling out then, unless they are a giant breed and i heard that they aren't fully grown until about 2 years!

    i am curious about this too since i have an 8 1/2 month old puppy!

  4. #3
    Senior Member Dogstar's Avatar
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    Re: when do puppies reach their full adult size?

    Depends on the individual dog and the breed. Mal grew until about 20 months and he's far from a giant breed (60-some pound collie). Kaylee, his sister, was full height by 14 months. Lizzie, who has just turned a year (spitz) is beginning to fill out so I suspect she's reached her full height. Toy breeds typically mature earlier than larger dogs. Giant breeds- like IWs can continue to grow well into their second year and a friend of mine has an IW boy who isn't mature yet at 3 and a half!

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    Senior Member pugmom's Avatar
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    Re: when do puppies reach their full adult size?

    APBTs don't fully mature till about 2yrs or so ....more then a few owners have told me their dogs kept growing till then as well.

    My Boston seemed to stop somewhere around 18 months..my pug was around the same time too....18mo

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    Senior Member Meghan&Pedro's Avatar
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    Re: when do puppies reach their full adult size?

    The growth rate is dependant on two things - size and breed

    Small breeds - under 20lbs full grown - will be skeletaly done growing at 8 months, with adult muscle developed by 10 months

    Medium breeds - 20lbs to 50lbs full grown - will be skeletaly done growing at 12 months, with adult muscle developed by 16 months

    Large & Giant breeds - 60lbs and up - will be skeletaly done growing at 18-22 months with adult muscle being formed by 30 months


    Now the trouble with this is that there are always breeds that are on the cusp of small / medium breed. Or on the cusp of medium/large breed so this is just a guideline, and this guideline is meant to, mainly, suggest when full athleticism should be pushed.

    ie - a beagle can be as small as 18lbs and as large as 40 depending on breeding - so for them, although they are on the cusp, their breeds growth rate is that of a medium breed.

    And boxers - they can be as small as 35lbs and as large as 90lbs, but their growth rate is that of a large breed, so should be fed and exercised as such.

    For example - my Miniature Pinscher showed amazing potential as an agility dog by 5 months, but we did not introduce any of the real equpiment until he was about 10 months, and started getting him into shape that way. I didn't want to push too hard on soft bones and open joints.

    Where as my Boxer X Rottie cross, at 7 months, still has another year before she can try any agility equipment for the first time!

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    Senior Member ioreks_mom's Avatar
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    Re: when do puppies reach their full adult size?

    Meghan&Pedro, thank you for the information! it was very informative.

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    Junior Member Deriffic's Avatar
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    Re: when do puppies reach their full adult size?

    Good question, I was wondering the same thing.

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    Senior Member musicmom116's Avatar
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    Re: when do puppies reach their full adult size?

    Quote Originally Posted by carey View Post
    I have a 3 month old puppy. I was wondering at what age most puppies stop growing
    I'm always wondering how big Dallas will get. We met 2 other owners that have the same type of dog as we have from the same breeder. They said their dogs are 50ish lbs and one is 1 yr old and the other is 2 yr old. However Dallas is now 37 lbs at 6 months old. So does that mean she will only gain 13 more llbs as an adult?

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    Member japhyr's Avatar
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    Re: when do puppies reach their full adult size?

    I have a friend who has a catahoula/ heeler mix. I used to go hiking quite often with the dog. She was a perfect hiking dog - big enough to climb hard mountains, and hardy enough to climb glaciers and snowfields. At the end of the day you could pick her up and hold her upside down in your arms and rub her belly, or she could sit in your lap after dinner. She was four years old at the time.

    My friend left town for a while, and I did not see the dog for a year and a half. The dog stayed at different people's homes for a while, sometimes getting good exercise and sometimes being a couch dog. I saw her a couple weeks ago, and did not recognize her. She did not just gain weight - she got taller, longer, thicker, and even her face got longer. I had no idea a dog could change that much after four years.
    Willie, our awesome blue heeler puppy

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    Junior Member Windsors_Dad's Avatar
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    Re: when do puppies reach their full adult size?

    I kept a growth chart for my Golden Retriever/Lab mix. He's 14 months old now and 61 lbs & 25 in. in height.

    He leveled off at this weight and height at 10 months.

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    Member jconli's Avatar
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    Re: when do puppies reach their full adult size?

    Somebody told me that to find out what size your dog will be, you take their weight at 5 months and double it. Anybody know if that is true?

    Casey (10 months) and Roy (11 years)

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    Senior Member melgrj7's Avatar
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    Re: when do puppies reach their full adult size?

    Lloyd is almost 2 (will be in december) and he just seemed to have stopped growing. He was full height probably around 10 months, but then he got wider and filled out.

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    Re: when do puppies reach their full adult size?

    Quote Originally Posted by jconli View Post
    Somebody told me that to find out what size your dog will be, you take their weight at 5 months and double it. Anybody know if that is true?
    Nope. Not true. My CC was 5 lbs at 5 months and is now 27 lbs at 8.5 months

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    Senior Member wvasko's Avatar
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    Re: when do puppies reach their full adult size?

    Standard rule that I have gone by that they stop growing up at 15 mths and then will mature(widen etc) and by 3 yrs done except for the rascals that get fat. This does not means all dogs keep growing till 15 mths as all dogs will do their own thing it just means none will get taller after 15 mths.
    Dinosaur Dog Trainer


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    Senior Member Meghan&Pedro's Avatar
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    Re: when do puppies reach their full adult size?

    ioreks_mom you're very welcome

    It's neat to see some of the other ideas and theory's that other people have come up with. I've never heard of some of them!

    I've always been taught it's strictly by breed's growth rate and mom & dad's sizing.

    And one interesting thing for the person talking about the catalouah : "Disturbed release of growth hormone in mature dogs: a comparison with congenital growth hormone deficiency"
    http://veterinaryrecord.bvapublicati...act/133/22/542

    That's a neat article. Probably nothing to do with the dog in your story, but that might explain some dogs that continue to grow for longer periods of time than others?

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    Re: when do puppies reach their full adult size?

    Quote Originally Posted by Windsors_Dad View Post
    I kept a growth chart for my Golden Retriever/Lab mix. He's 14 months old now and 61 lbs & 25 in. in height.

    He leveled off at this weight and height at 10 months.



    Really? My Golden/Lab is 50 pounds at only 6 months. i know every dog (especially mixed breeds) are different, but i think I may end up with a very big boy! How tall is your dog? What did he weigh at 6 months?

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    Senior Member tuffycuddles's Avatar
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    Re: when do puppies reach their full adult size?

    this makes me so happy....i was under the impression that dogs were fully grown at 6months..don't know why i thought that.. but anyhow my pup is 4 months old weighs 26lbs. she is about 15-18inches at the shoulders....i know she is germanshepherd and husky..but i keep getting worried she was also something else pretty small and wasn't going to get very big.. i'm a huge fan of big dogs! so i'm happy to hear that she'll keep growing. (:P i'll love her every bit as much if she doesn't grown any too )

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    Re: when do puppies reach their full adult size?

    I have a 5 month old yorkie-poodle mix and she's 2.6 lbs. Does anyone know approximately when she will reach her adult size? Right now, she has a poodle body length and short yorkie legs. Cute as heck.

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    Senior Member NalaBaby's Avatar
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    Re: when do puppies reach their full adult size?

    Quote Originally Posted by musicmom116 View Post
    I'm always wondering how big Dallas will get. We met 2 other owners that have the same type of dog as we have from the same breeder. They said their dogs are 50ish lbs and one is 1 yr old and the other is 2 yr old. However Dallas is now 37 lbs at 6 months old. So does that mean she will only gain 13 more llbs as an adult?
    It could, because most puppies grow very fast until 6 months and then the growth rate slows down, however, your dog could end up bigger than those too.

  21. #20
    Senior Member Erick Aguilar's Avatar
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    Re: when do puppies reach their full adult size?

    It really depends...
    Feeding also plays a big role in a dogs growth.

    I had a rottweiler that wasn't done growing until his 2 1/2 years.
    And my Siberian Husky is 9 months old and i still think he should be bigger.

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