If you are interested in keeping Pet Pygmy Marmosets then at first you need to get a special permit, these are difficult to get and vary from state to country. You have to have a special type of permit to have these kinds of primates. Another thing you have to make sure there is a special type of primate veterinarian in your area, not an exotic animal veterinarian a special type of primate specialist.
Pet Pygmy Marmosets are extremely difficult to keep, as a baby they require feeding every two hours for up to two weeks. Pet Pygmy Marmoset Monkeys are also known to throw feces, to attack, and to bite their owners. These things make keeping a Pygmy Marmoset extremely difficult.
Pygmy Marmosets also live in groups, this would be unfair to keep them in a solitary cage. Pygmy Marmosets usually live in family units of up to five monkeys. It is also illegal to import different types of primates in the United States, and illegal to export Pygmy Marmosets in South America.
Despite this many people still have Pet Pygmy Marmosets, these are devoted pet keepers and are usually extremely knowledgeable about keeping them. Do your research and you will be able to keep a pet Marmoset.