Yes I know there is a food chart on here but I don't remember seeing anything about soy milk. I hope they can because I was drinking some outside and there was a little bit left so I tipped the cup over to one of the girls and she sipped it up. She kept sneezing though. Also will my roo get sick from eating canned dog food? I didn't intentionally give it to him, you see my mom let the dogs in the yard. So I let the chickens in the back, they followed me to the porch and a few minutes later I noticed the roo eating out of one of the dog's dishes. I quickly shooed him away with a stick and set all the bowls on the table. Please tell me I won't have a dead chicken!