I really don't want to put in a full-sized door. SO, if I just cut off the bottom part of one panel of siding, will the opening in the barn be large enough for my "herd"? (2 Dairy goats) It would be about 18" wide and 3 foot tall. Is that big enough for the goats to come in and out of the barn?????? I am wanting to cut the hole this weekend. Pleae give me your thoughts. Thanks!