The other day I was watching on TV "When Dinosaurs roamed America" They were saying that a T.Rex mother and her two offsprings would hunt in a pack like wolves. The offsprings because they could run faster than the adults would herd the larger prey into a trap where the mother would ambush the prey. This made me wonder, how was this complex group hunting plan communicated within a group of animals? To me this demonstrates cognitive thinking and means of communication that is not apparent to me. I remember seeing similar feats on the part of dolphins, killer whales, and chimpanzees. I am beginning to think that there are animals that have the same level of intelligence as "hunter/gather" early Homonids. Would like others to share their experiences, knowledge, or thoughts on this subject.