Nutrical can also be fed daily. It is a good idea to offer a calcium based antacid such as Tums, also. Callitrichids like to sleep in a box where they feel secure. They prefer to sleep up high and like to have towels, blankets and stuffed animals to snuggle up to. Most go to sleep at sunset.
Many owners allow their callitrichids to run free in the home.
These monkeys are not particularly messy animals and can be somewhat trained to defecate in a given area. Their urine is not very strong, and they tend to urinate frequently in many locations. They are intelligent and need stimulation. Interaction can be supplemented with toys, but if a callitrichid is kept singly as a pet, it will rely on the human family to become its family group. Health Concerns Pet callitrichids should have annual physical exams and stool cultures.