My chickens can get into the goat pen, but the goats can't get into the chicken area
they fly over, or go under the door, the only time I have trouble is if I get little goats, they are very good at squeezing through areas.
I do too, have had no problem except chicken poop on a goats back occasionally, my chickens go under a gate or over the top to get in and out, no chicken feed for my goats, although I did have a goat who could jump four feet over the gate, eat the food and jump back, caught him in the act, put...