Hi everyone! This is my first time posting in the forums and I would like to thank anyone in advance who helps me with this predicament. I'm still pretty upset about the whole thing. First I would like to start off by saying that my entire backyard is fenced in with a privacy fence and it was just done not long ago, so there aren't any holes in the boards and there aren't any ways to squeeze under the fence (well, there could be but I'm not so sure of what could squeeze so flat to go under the fence). Also, I have a separate area for my chickens and ducks and their pen is fenced in. They have two separate coops; one for the chickens (I have a full grown Silkie chicken and she has a baby) and I have two female Khaki Campbell ducks, who have their own separate coop and their own pond that I had dug into the ground using a large tub so they can dive under and scavenge. The ducks and the chickens get along just fine. Now I have a small flock (10 baby chicks) who have a little hut they go into with a red lamp. They are able to get out and look for food. When they are done they go back into their hut. Everyone - including the ducks and the mama chicken get along just fine. Last night, two of my smallest baby chicks disappeared. There was one laying next to the duck pond, dead. It had teeth marks in it and it looked like it had been chased around before it finally passed. It broke my heart so much. There was no sign of tearing, ripping of what ever feathers it had - etc. The behavior of the other animals in the pen were normal as I proceeded to do my daily activity of cleaning and feeding. Could you name some of the common predators that could do this? And can you give me some ideas in order to prevent a future attack? Thank you so much! Edit: I should also mention that this is my second time having chickens again. The last chickens that I had were full grown so having babies is a new experience for me.