How long does it take a male pet rat to grow full size?

Answer 1

A rat would be considered pretty much full grown by around the 9 month mark

How BIG it grows however, is dependant on its genes and its feeding as a kit
A rat with good genes, from a good breeder who feeds a high protein diet, alongside a varied high quality dried food, to mum whilst nursing[ not carrying] and kits until the rehoming age, then suggesting it continues to the 20 week mark, before reducing the high protein and continuing the rule of 80% high quality dried to 20% high quality fresh, will be much bigger [sometimes even double the size] than a petshop mass bred rat fed generic lab blocks [nuggets] or poor quality feed all its life

So an adult 9 month old petshop, massbred poorly fed rat could be only the size of a 5 month old well bred well nourished breeder kitten with loads more growing to do

Look here
http://www.goosemoose.com/component/option,com_smf/Itemid,118/forum,rat/
here
http://australianrats.proboards82.com/
or here
http://fancy-rats.co.uk/community/

for more friendly upto the minute advice and knowledge from truly friendly ratminded people

Answer 2

nicely with rats they might get very vast thers no actual set length it relies upon on how plenty nutrition theyget and how plenty area the greater nutrition andspace they larger they get, the avarge rat from nostril to tail tip is approximately 8 to 9 inches gerbils stay approximately 5 to 7. heavily those memories you hear a pair of rat the dimensions of a chihuahua would desire to o.k. have been actual. i had a male rat that became into as vast as a 20 oz..pop bottle in uncomplicated terms rounder.

Answer 3

About 6 months if I remember correctly. They make great pets if handled from a young age.

Answer 4

Pretty much by 7-8 mths. the rat will be at his full size.
May bulk up more at year.

Answer 5

It took my dad 14 years.

Answer 6

about two to three months at most