I have a black sex link hen, Cookie, who has been my best egg layer but suddenly stopped laying eggs and is just hanging around. She doesn't have the energy to jump up onto the roost in the coop, just sits on the shavings. She will eat if it's a special treat like rice or bread, but doesn't seem to eat the regular food. She will drink if you put her in front of the water. She stays in the coop for a while before coming out, unlike the rest of the girls. It's been about 5 days of her feeling sick. I felt to see if I thought she was egg bound but don't feel anything. She has watery diarrhea. Today I started giving her (and everyone else) oxytetracycline in the water and know she has drunk some. Any advice? The other girls are feeling fine and laying eggs like normal. And if the other ones drink that medicated water, should I not eat the eggs for a while? If not, how long? Advice would be welcome.