Mine is 3 months old and looks as big as my 6 month old pekin. I don't think it will get much bigger from what I have read.
they are fully grown when they are 6 years old
There is now way to find out how old it is but you can find out when it is fully grown when the black lines on it's head have gone.
Fully grown physically at one year old; fully grown emotionally at between twe to three years old.
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6 years old
Adult. Most guppies are fully grown at a year old.
To breed, two and a half, to be fully grown, three.
A gerbil is full grown by 6 months old and measures 7-8 inches including the tail.
No some ladies are that hieght fully grown
if that five year old is a haas No. Their genitals aren't fully grown yet.
Usually they are given away when they are fully weaned from their mother and eating food on their own. Six weeks is very early--8 is better.
By the time baby platypuses are two years old they are fully mature.