I know a lot about monkeys and when you see David go for the baby or making a certain noise and you would know, David is a baby also and will get jealous, it’s not David fault
Monkey David is less than 0.5 kg shown from one of the video. He is way too light. Just watched Monkey Mon and Kaka , kaka is 1.5 kg which is around half a year old. But David is one year old.