As summer is coming to an end, my pots of flowers are getting sad and I use to always just dump into compost pile. Well now I have chickens and wonder if the plants are ok for the chickens? I have wax begonias, salvias,coleus, petunias, impatiens.... I would like to just set the pot of flowers in the run and let them have at it? Any of these flowers not good for the chickens?