Hello Shashie.
My suggestion for you is to keep them apart for a little while, it might just be that the skin of the chicks is showing and they are taking interest in the red colour until they draw blood, an even redder colour! This behavior is typical and I wouldn't worry about it. You do need to keep them apart until the chicks are fully feathered though, and then try introducing them again.
However, if these turkeys are the white commercial breed (BBW) I would keep them apart and never let them be with other birds. My DH and I kept a variety of turkeys a few years ago. We had the BBW, White Holland, BBB, and Rio Grande. The BBW were by far the fastest growing birds and so we didn't think too much of it at first when they began to pick on their smaller brooder mates. But their aggressive behavior progressed until one day they cornered and killed another poult. They didnt actually kill it right off they worked together (there were 4 of them) and pecked the poor birds beak until it was smashed to pieces and though I tried to save him, he died a few days later. Even when they were older and all were let out to free range 2 acres they would gang up and kill other birds, mostly Cornish Cross hens that were either too stupid or too fat to get away. At 16 weeks I had the last straw when I went out to feed only to find my favorite Rio Grande dead with its head and beak smashed up(Btw: this turkey had already been attacked by them when it was younger and had a chipped beak as a result). We threw these vultures into solitary confinement and butchered them the next day. It was the first time we had ever processed anything before and Im sure we wouldnt have done it so soon nor started with a turkey had it not been for all of the problems. We never have nor ever will raise that breed again.
