M.K.
hey Mom,
I have heard of it,
But I usually starts when a child begins to eat.
When food takes more of a priority.
The nursing is up to you, a personal preference.
If your ready, you need to get him ready,
which basically means offering him more juice cups, and cows milk in a cup. during the day.
and then still nursing just before bedtime.
after 2 years old, you can try and wean him off the night nursing. with perhaps pumped milk in a bottle.
--In my opinion there is nothing wrong with nursing however long you feel comfortable.
However, at 3 many children start a part time nursery program, which ususally requires them to be potty trained.
Just something to think about.
Good luck
M