Pat Coleby Information I'm a firm believer in Pat Coleby's information. She has revised Natural Horse Care, and the book is even better than before. The book has more pages and is more detailed with new information. Available at Amazon.com I highly recommend everyone buy this book, it's invaluable. I keep it handy as a reference and refer to it frequently. Currently I offer my horses the following: Free choice Purina Free Balance 12:12 and Redmond salt rock (also called Trophy Rock. Once I started offering the Purina Free Balance, they backed righ off of the kelp.