There is NOT a certain amount of time for this to happen.
You just have to keep feeding eat and wait until it gets a bit hungry again then feed it some more.
Some people stand there and wait until it is fully grown and just keep feeding it but you can do whatever you are doing but keep food with you. When you first get it, it gets hungry very easily. The older it gets, the longer it can last without food.
I think they like to eat 'Raw Beef' or something.
NOTE: You MUST have your dog out and dropped so it follows you around. Nothing will happen if it is sitting in your bank or in your inventory.
Hope this helps answer your question. Enjoy. :) :p
It depends how long you are on Runescape.
About 5-10 mins
That Entirely depends on how many hours a day you play runescape.
if ur hunting lv is 100
It could very from a day or two day's.
It just depends on your behavior.
about a year or so
About 2 years
It depends how long you are on Runescape.
becoming a member doesnt take that long should take less than 5 minutes but could be longer when more people are playing the game
on average for most types of corn 90-120 days
A male golden retriever can get 4 ft long.
Not that long, it's almost instant.
Go to:runescpae
about 30sec or 1min
well if you played runescape 24/7 it would take probealy take 2-3 days to do .
If you just started RuneScape maybe 30 minutes and if you already have a RuneScape account 7 minutes minimum.