Available only in Quebec & Maritimes. The Portable Bunk Feeders feed hay, grain and silage. The rear door provides access and easy clean-out. Widths: 5' or 6'; Lengths: 12', 16', 20' or 24'. Available only in Quebec & Maritimes. The Portable Bunk Feeders feed hay, grain and silage. The rear door provides access and easy clean-out. Widths: 5' or 6'; Lengths: 12', 16', 20' or 24'.