I agree with kfamr's choices. There is so much to choose from but I like:

http://www.k9design.com/Fall_BowWows..._Splendor.html

For Digger

http://www.k9design.com/Betty's_Best...s/Trekkie.html

For Chubby

http://www.k9design.com/Winter_BowWo...#39;s_Eve.html

For Prince

http://www.k9design.com/Summer_BowWows/Fireworks.html

For Otis