About 4 month old puppies turning dangerous? HELP.

I really don’t know what to do at this point. BEFORE ANYONE COMMENTS SAYING THE PUPPIES WERE RAISED TO BE DANGEROUS, NO THEY WERE NOT.

We have 3 pups that are about 3-4 months old. They were raised spoiled and very sweet. Very lovable and NEVER fought each other or any other dogs/pups. They were all bottle fed since they were a few weeks old due to the mother disowning them.

They grew up in and out of the house due to our rescued/stray pup that we have that had grown up with anxiety/seizures/depression.

Last night, we heard a commotion out in their kennel/dog house but when we got out there, it had stopped. We let the pups in today to give them their daily bath and notice our skittish pup had a tiny gash in between his eye, so we separated them while we doctored the pups eye, then let them in the room to eat. After they ate, they were laying down to rest when all of a sudden, the biggest pup (we call him boss), started attacking our skittish pup (Pete).

By attacking I’m talking about grabbing him by the neck AND the eye (same way his eye was gashed the other night) and was dragging him by the leg. I went to tear them apart and boss (the one that started attacking first) clenched onto my arm tearing at it leaving four tiny but deep pinpoint wholes and three gashes about the size of an inch, so I pull him off me and ran and got my SO for him to tear them back apart.

I just really want to know what I need to do. They were never raised to be like this. And I feel as if they will get worse. (The third pup is a sweetheart and has NOT fought any of them or hurt me yet. She’s the runt and is really tiny)