Treating lice on bull calf

I have a calf that had to spend some time at a neighbor's farm. He spent about 2 months with some other calves. I went to get the critter and he looked like he got a case of the mange. I currently have him separated. I treated him with Ivermectin pour on and put some insect powder down in his containment area. How long should I keep him separated? Anything else I should do to this old boy to treat the problem or prevent infecting the rest of our livestock?



Thanks



Treating lice on bull calf