They've found proteins in some of the trex remains and those proteins are all but identical to those found in chickens, i.e. the trex was basically a big chicken with sharp teeth. Nobody has come up with an explanation as to how trex remains in Montana were "contaminated" by chickens...
http://www.nytimes.com/2007/04/12/health/12iht-web0412-dino.5261850.html
They've found proteins in some of the trex remains and those proteins are all but identical to those found in chickens, You say "all but identical," the Times report says "Three of the seven reconstructed protein sequences were closely related to chickens....Two others appeared possibly elated to living creatures, a frog and a newt."
Is that you, Brian?