If she has Mareks in her flock and the outside of the eggshell has been exposed and she puts it in an incubator would she not then have Mareks in the incubator to expose the chick to? If that's the case then how is vaccinating a chick who's been exposed to merits going to help?
Ty
If you haven't given up yet try a simple recipe of equal parts chick crumble grower or layer rolled oats and wheat or hen scratch. Fill bucket half full add water to cover 1 in. Cover with tea towel and keep in 70 degree ish. Stir a few times a day. Leave 3-4 days strain water feed and use...