livestock

I shoot mainly livestock shows which are primarily indoors and in lower lighting. What settings do you guys recommend?? I have a canon ultrasonic 28-135 lens and a 7D body

1.) I'm a livestock owner in NW Oklahoma so I have a number of cattle photos that would look great as canvas prints, however the cost of prints plus markup to make it profitable is outrageous. any ideas or advice? 2.) What is your go to website for your online gallery? 3.) what is your choice...