My understanding with respect to hormones is that steers are given some hormones via in implant under their skin, but it is actually a lot lower levels of hormones than an intact bull would have naturally. As for antibiotics, any modern food supply system in a western country do not allow cattle with anti-biotics in their system to be slaughtered for food and the government will do testing to verify this. Generally farmers want their cattle to be healthy so the do not pump toxins into them. There is a slight difference in the omega 6/omega 3 ratio between grass finished and grain finished, but it's not that important if you are avoiding industrial seed oils. All beef cattle (at least in north america) are raised mostly on grass, then fattened up with grains for a short time before slaughter. Where I live they don't use corn in the feed lots, so I don't know if corn finished beef is bad for you or not as I haven't researched it since I don't eat corn finished beef. I suspect it's probably ok.