I recommend getting a copy of the book "Bacteriological Warfare: A Major Threat To North America" by Larry Wayne Harris (Registered Microbiologist and a Christian)
Why do you need this book? Here is an example: Chapter 13 is on Preparation of Veterinary & Agriculture Antibiotics for Human Use. This chapter has dose charts for using six of the most commonly available veterinary antibiotics.
Used copies are often available through Amazon.com from private sellers.