From someone who has a snake, I would never feed it chickens. Some may not agree with the fact that I have 2 rats that I use to breed Pinky rats for our snake. Does it really matter that she feeds her snakes chickens? Unless of course you sold her the chickens and told her they were only for eggs etc.. Still you can't control what people do with them once they walk out the door with them. Sounds more to me like she knows you will bite easily so she is having a go at you.