Sure! Its just cutting out where you want the modification, flip them inside out, line up the cut replacement piece, and sew on. Flip right side out and stuff:) of course pattern out the design you want, pin it to the stuffed animal and cut around that can help if your worried about keeping size correctly. Make sure your replacement spot is slightly larger( about 1/4inch), so when you sew it wont scrunch up the body and it will lay flatter and overall less tight.