All Hands on Pets! by Susan E. Davis is a wonderful resource for those interested in the pet health care industry or who have a senior or injured dog or cat. Injuries and therapies for them are explained in technical language but still understandable for the non-professional. The personal stories as examples highlight each section as well as several tales in Chapter 10.
As a mobile groomer, I like that it shares information on prepping a puppy for being vetted and groomed. It also describes exercises to build strength, endurance and agility for all ages of pets, with section for each ages of the pet.
I think many of the massage and other techniques could be also used on a horse and other farm animals as mentioned in the book.
It has a great list of professional resources at the end.