I might have to try that. Maybe if she stops feeding them long enough they will stop goitover to her place looking for food. I have been making sure they have extra food just to be on the safe side.This may have been covered, but how many chickens are we talking here? 6? 60? She definitely needs to stop trespassing on your property and feeding your animals. I am wondering if - before you put up your fence- she liked the few she saw and fed them, but then realized how distructive they can be? Chickens can destroy a garden very quickly. Even though you say her plants were dead, she may have just planted new ones or bulbs.
Everyone needs to stay on their own side of the yard. I would tell her ‘I’m so sorry to have to ask this, but my chickens have gotten a bit sick and are now on a special diet, so please don’t feed them’.