You dont need to change their feed. If you give them Sulmet, they probably could use some probiotics. It's good for them to have anyway. I regularly give mine plain yogurt.
Definitely, you can still eat the eggs. Should not be an issue at all. If you'd rather not, no problem, but Amprolium isn't...
Best thing to get is Corid/Amprolium. OR Sulmet, which usually knocks it out in a couple of days (though they take it about a week). Sulmet may continue the intestinal bleeding, so it's best, I've been advised, to use Corid first. It's a liquid in a bottle 9.6% concentration and you use 10 cc in...