Chaldea (if you're using the word in the biblical sense) was in the fertile crescent. Chaldeans didn't migrate there—they were there already. They were Sumerian in modern day Iraq by the Euphrates and Tigris rivers.
Nevertheless, I do believe it's true that the Sumerian religion of the Ubaid period did influence later Babylonian, Assyrian, and Hebrew religions as far as animal sacrifice. The Sumerians made ziggurats on which they sacrificed animals to sustain their gods.
In Egypt the tradition seems to be a bit different. They killed animals and mummified them for passage into the afterlife which could be considered animal sacrifice, but the sentiment is much different. They were not killing animals to sustain their gods or to purify the person giving up the sacrifice as was common in the more eastern fertile crescent. Here's something that talks a bit about that:
The History of Animal Sacrifice
And, about Chaldea,
Chaldea - Wikipedia, the free encyclopedia
And the Sumerian religion,
Sumerian Religion
~modest
