Even without speech communication is possible, physically with animals. I have a dog, and when it craps on the floor, I give it a single look, and it KNOWS that it is in trouble. Couldn't identifying and relating mannerisms be classified as a form of speech? And if so, wouldn't this suggest that almost all animals in some way recognize certain patterns of communication?
This link isn't scientific by any means, however energy work is universally recognized in every culture.
Page not found
Furthermore, this would suggest that all animals can pick up "vibes" just like when we walk into a room and can sense discomfort. IMO, it is because of the vibrational state of unease that combines, resonates and amplifies within a group. Which could suggest a form of communication through vibrational emotional states when applied to pack animals, or any animals.
A question to IamJoseph:
There was a talking serpent in the Garden of Eden; why wouldn't animals be able to communicate thoughts and ideas? Commonality doesn't always point towards the ToE.