From what I've read, usually about 8-10 weeks old. There are breeds of chicken which gain several pounds in that span of time and which would have health problems later in life if permitted to live.
It does not take a chicken long to reach slaughter weight. It should take a year or less in commercial farming.
A very long time.
5 months
Algae can grow back in as soon as 5 hrs.
maybe about a month or two (scales grow slowly)
It takes between three to five years for a lion to fully grow.
3 years
A chick is a young bird! An elephant is a mammal. So unless 'magic' is involved, a chick will never grow into an adult elephant.
Three days!
It can take up to twenty one days for a chick to hatch out of the egg. In incubation, it may take up to 24 hours for a chick to hatch out of the egg.
21-25 days
Take the chick over, take the feed over and bring the chick back with you. then take the fox and bring it over. then take the chick back over.
how long does it take pseudomonas to grow in a bottle of water?
how long does it take for a baby carp to grow full size
how long does it take to grow a new layer of skin
Rhode Island Reds are a dual purpose bird and are used for both eggs and meat. They grow slower than breeds designed specifically for meat. The roosters grow to slaughter size by about 16 weeks with proper feed and finishing. Hens can be held longer and ready for the table by 18 weeks but muscle development is slow enough to hold off slaughter until both genders reach as much as 28 weeks, allowing for a full 4 to 6 lb carcass.
it took 6 years xxx
about a year for sure