Glad to see a fellow user of the book "The art of animal drawing" by former disney drawer Ken Hultgren. This book is simply amazing and tells so much about animal anatomy. Personally I never thought about the elongating and pushing of muscles before I read this book. But I see, you are far ahead of me by now, since I can't get close to his suggested drawings to save my life XDDD Good job
yes it is a brilliant book, like you it hadn't crossed my mind before I read his book. Ken Hultgren is one of my top favourite artists and I've learnt a lot from studying his work. And thank you a lot for the comments, I really appreciate it!