Yeah - this is known. "Chicken" is also a known code word for young boy.

However, Moloch isn't represented by an Owl - Moloch is a Bull, though he is often represented having wings. Moloch was the god of the Ammonites, a tribe related to the Hebrews through Abraham. Children (usually young boys) were sacrificed to Moloch by throwing them into an oven at the statue base. The Moabites also worshiped Moloch, but under the name Chemesh. Same practices.

The Owl, also at Epsteins pedo island, more likely signifies Lilith (which is the Hebrew word for owl). She is an even older deity, with roots in ancient Babylon. Basically the female version of Satan. In the Bible, I think God says something about her finding a home with the Edomites (as a threat). Her main thing is sexual temptation. And, again, child sacrifice.

The originator of the email was W. Lewis Amselem. Not the cleanest of chaps:

https://tenpercent.wordpress.com/2009/09/29/lewis-amselem-friend-of-rapists-scum/