Our dog Kaiah is a rotti mix and is used to wearing dog coats which this costume evolved from. Basic black dog cot with hood easy to find a free pattern on internet i used about 1/2 yard she is 70lbs. Ears are 2 triangles sew leaving bottom open and stuffed paint pink first (i didnt) hand stitch to to of hood. The casing of hood i used elastic and tie ends together to form a strap under dogs chin.
Saddle 3 peices of scrap faux leather. Trace seat shape 2 peices sew together , back of seat 2 small peices with thick interfacing in the center sew attatch seat peices,add 1 peice for strap goes around dog and velcroes to bottom of saddle . Add a horse blanket any small scrap hemed.Sew with fishing line to dog coat a few stitches allowing ssrtap to be attatched