I was told by someone that if the vultures were on here then it most likely wasn't poison. I found her because of the vultures so I am not sure if that means anything. The other 1 year old on the lease seems to be fine, as do the 2 year olds. I guess it is one of those things and I than you all for your help and compassion.
On another note, since I am somewhat of a geek, I have been researching cattle prices for the last 20 years and trying to determine if there is any common factors that affect prices. I really haven't found much, but I did find it interesting that over all the price of cattle has risen about 2.35% per year for the last 20 years. Did I get this right?