I have 2 hens who LOVE to stand in the rain. For the past 2 days thats all it has done here is rain. Been in the 50's through the day and in the upper 40's at night. I am worried they are gonna get sick. They will just stand there in the pouring rain eating and scratching for food. Pay not mind to the down pours. I mean lastnight when I made them go in they was soaked. I am worried they are possibly gonna get sick. Can I add some Antibotics to their water to help incase they get a chill??