In advance: Make chick's wings and hair tuft, horse's ears in royal icing on waxed paper covered board. With tip 16, pipe zigzag wings, 1 1/2 x 3/4 in. wide, and pull-out hair tuft. Pipe tip 366 pull-out ears, 1 1/2 x 3/4 in. wide. Let dry.
Bake and cool 1-layer 15 in. hexagon and sheet cakes and 4 mini ball cakes. Cut hexagon horizontally in half and position on foil-wrapped board against top edge of sheet cake. Ice cakes smooth. Mark door and windows with toothpick: Door is 4 3/4 x 3 1/2 in. wide, side windows are 4 3/4 x 3 1/2 in. wide, top window is 3 3/4 in. square. Ice window areas smooth. Pipe tip 2B band boards. Use smooth side of tip 47 to pipe band trim on windows and door. Edge barn with tip 2B bands. Position 4 mini ball cakes on foil-wrapped boards. For horse: Extend nose 1 in. using fondant; attach to cake with buttercream icing. Ice nose smooth. Pipe tip 3 dot eyes and pupils (smooth with finger dipped in cornstarch). Outline diamond on nose with tip 3; fill in with tip 16 stars. Cover head with tip 16 stars. Insert ears. Pipe tip 16 pull-out mane, tip 3 outline mouth and pipe-in nostrils (smooth with finger dipped in cornstarch). For cow: Trim 1/2 in. off top of head. Using tip 4 pipe in nose, pipe dot eyes and pupils (smooth
with finger dipped in cornstarch. Using tip 3, outline eyebrows and mouth, outline and pipe in spot around eye. Pipe tip 12 pull-out ears; pat smooth to indent center. Using tip 16 cover face with stars and pipe pull-out hair. For pig: Pipe tip 3 dot eyes and pupils (smooth with finger dipped in cornstarch). Cover face with tip 16 stars, overpipe snout for dimension. Using tip 3, outline mouth and eyebrows, pipe in nostrils (smooth). Pipe tip tip 366 pull-out ears. For chick: Trim cake 3/4 in. high. Outline and pipe in beak with tip 4. Pipe tip 3 dot eyes, outline eyebrows and smile lines. Print tip 3 message.
Position animals on cake. Pipe tip 233 pull-out hay. Attach wings and hair tuft to chick with tip 3 dots of icing.
*Combine Lemon Yellow with Golden Yellow for yellow shown. Combine Brown with Christmas Red for brown shown.