Will Falconer, DVM Moderator
Hi Taryn,
I use several, but my main one is the Concordant Materia Medica, by Frans Vermeulen. A really nice compact one is Boger's Synoptic Key.
Unfortunately, they're all written about human symptoms, but you can "translate" into animal language, as long as you're not doing this too heavily in mental or emotional symptoms (which could easily be misinterpreted and lead you astray).