free, up to date, online version of Merck for Pet Owners

This a reference manual for pet owners, as opposed to a technical manual for veterinarians, veterinary techs, etc.

The Merck Manual for Pet Health
"As part of its commitment to ensuring that all who need and want medical information can get it, Merck provides the content of these Merck Manuals on the web for free (visit www.merckmanuals.com). Registration is not required, and use is unlimited. The web publications are continuously updated to ensure that the information is as up-to-date as possible."

 

Very nice, thank you.