"Joey" is a general term referring to all marsupial young. Therefore, it would depend on the species of marsupial. Even within the commonly known kangaroo family, there are over sixty species, so there is no single answer.
For the animals most commonly recognised as kangaroos (e.g. Red kangaroos and Grey kangaroos), the average is about 7 months while they are still in the pouch. They may continue to suckle for several months longer, but are no longer dependent solely on the mother's milk.
Not enough water. The milk you feed him/her is their food they do need to be fed water.
Baby wallabies, or joeys, feed exclusively on the female wallaby's milk. There are different types of milk according to the age of the joey. If one finds an orphaned joey, it is imperative that the animal be taken to a registered wildlife carer who understands the joey's specialised needs. A vet will know how to contact such a carer.
about a year
four months
1 year
Five Years
3-4 months
Five Years
3-4 months
Not long; the body will stop producing milk (lactating) if the breasts are not being used to nurse or pump milk.
Dolphins drink milk for up to three years.
I thinc it is abut 3 months