It is hard to tell what the dynamics are in that group without seeing them, but it sounds like the pups are becoming adults and challenging the more submissive animals in their group.
What kind of training have you done? Are you in charge? You need to spend some time in the backyard with them when you let them out. Let out the female adult (mother) and the young female. When she goes after her daughter, call her over to you, down her, and make her stay when the pup runs around. You may have to do this over and over for several days before the message sinks in. (These are intelligent dogs, so you may just need to do it a few times. The main point is that you need to stick with it.)
Repeat this with the adult male and the submissive male pup. When you are confident the adult is not jumping the young dog, let the other male join them. Do not be surprised if the adult male stops behaving. Just start over.
When all the dogs are accepting your commands, let them all out, but only if you are with them. As soon as something happens, you need to respond immediately. Not ten minutes later, not five minutes later, IMMEDIATELY.
Again, I cannot tell you how long this is going to take. If you have not already trained your dogs to sit/down/stay, that is the first step you need to take.