I looked up info on violets. One site says they are toxic, the next says how good they are. Go figure. I have had violets in pastures before and no livestock died from them. If you put the goats in with the violets, keep free choice hay in front of them and they should be alright. However, if you REALLY want the violets gone, get a couple of feeder pigs and raise them in the violet pasture. The pigs will root them up, eat them and they will be gone, gone, gone. I currently have 4 pigs in a green briar infested 1/2 acre pasture (it has trees too) and they ate the vines, rooted up the bulbous roots and have effectively destroyed a lot of them. They have turned every square inch of dirt. It will be easy to get the rest of them out after the pigs are slaughtered. Then will come a planting of various grasses, weeds, clovers and herbs. The field will lie fallow until next spring before I put my sheep on it.