Marmoset Monkey for Adoption She is 3 months old and is very small. She loves people and is diaper and leash trained. She is very friendly with other animals and loves dogs. She is really smart and loves to suck on her toes while she is a sleep. she is so well behaved that we do not cage her. She is a very well behaved little monkey, very smart and needs more attention and time than we can currently provide. Her price is negotiable, but she must go to a loving home that has the time to devote to her. I have changed my mind several times about selling her, but since she is still very small and needs to be bonded I have decided to give her now.