I just recently bought a steer within the past 3 weeks and I'm having flea problems with him. Before we brought him to the barn,I sprayed the pen down with diluted Clorox and let it sit for about 2 weeks,so I know it's not a problem left from last years steer. We maintain his hair well and 2 nights ago,I sprayed him with a fly spray,like I do every night, and then sprayed ultra boss on him (what our jockey told us to do)& it didn't help much. Tonight,I called our jockey back and he said use a dog flea killer shampoo on,just by using his knowledge of killing fleas on dogs, so I did. Many are gone but we still have quite a bit left. Has anyone else had this problem,Do you know of anything we could use on him to get rid of them,maybe a medicated shampoo or something? Any help would be greatly appreciated!Thanks!