Ruby got to her adult height and weight at 9 months - she is weeny lab at 20kg though so not sure if she stopped early. At nearly 21 months she is really laying on muscle atm - her chest and thighs in particular are very muscled compared to how they used to be.
Doobs was 14 months when we adopted him, and was as tall as he is now. He has got all muscley now and will be a grand age of 3 soon. (when we adopted him, we were told he was 14 months and we imagined this wee pup - you can imagine our faces when in bounced this huge labrador who knocked us off our feet )
I asked the vet exactly the same and as Di says, height by about 12 months, but they continue to fill out until they are approx 18 months. Toby is 6 months and at last check he was 21 kg, the vet seems to expect him to get to about 35kg. Height wise his back is level with my knee, and I am 5' 7''.
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