How To Sew A Dog Draught Excluder How Can I Sew A Sausage Dog Draft / Draught Excluder?

How can I sew a sausage dog draft / draught excluder? - how to sew a dog draught excluder

I have some big project Cath Kidson dog sausage exclusion

http://www.retrotogo.com/2007/10/cath-kidston-do.html

and I was a doing. I found the snake pattern, which say they can be adapted for a dog, but not tell you how to sew on the head!

Can anyone help?

Thank you!