Thanks for all the feedback. I am a technology challenged person (though I am an engineer & MBA in qualification and currently head the Government relations of Nokia in Chennai/India). I just convert the RAW files using basic colour corrections, fill light, highlights, contrast etc using Lightroom. The vertical crop looks nice. The picture I had uploaded was an uncropped version. I was lying in my folders. Stumbled upon it when I was examining my files afresh through lightroom.
I have been photographing tigers and studying them for a number of years and contributing my pictures to help in conservation. I was forced to upgrade my equipment 1D Mark II and a 400 F2.8 IS as most of the time the interesting behaviour used to occur in early morning or late evenings. In 2007, four of my tiger shots reached the semifinals of the Shell wildlife photograher of the year competition. I hope the tips from experts here like you will help me in moving beyond the semis. Thanks for the tips. Please keep the tips flowing.