I have goats and the 2 adult ducks I have been feeding the pelleted food or crumbles for poultry. They eat it but will also run over and eat the goats food. The goats do the same thing. I separate them and the ducks go eat a few seconds and go over and look at the goats the goats do the same thing. neither food is medicated. The goats get sweet feed. Will this hurt the ducks.