I wouldn't need to buy a doll for that! When my daughter was little, she had her shirt up and her baby at her chest. I didn't even make the connection until I asked her what she was doing and she said "feeding my baby". I thought it was cute and since she had never had a bottle ,what would she know of feeding a doll one?
Then, again, they have a toy dog that poops now. My 5 year old wants it and I told her we would just rename her real dog to Joker my pooping pal! LOL.