Hi Julie,
We do make and supply the formula - no problem there. If the points and history suggest a chilly animal where, say, the main complaint was incontinence, then SFZYT is a good call. So, for example, if you tonified a warming point like ST 36 and the pulse improved, that would be enough to try it.
K'an makes a liquid version of one we use for hot animals, called Pang Guang Zhu Yu Tang. I believe we have made that in powder form for people as well. If heat signs are very prominent, you can use this.
For marginal heat signs, we can add Hua Shi to SFZYT. Another option is to try SFZYT plus SMS.
Other formulas that have worked in certain animals: Bu Zhong Yi Qi Tang and one called Gui Zhi Jia Long Gu Mu Li Tang.
Our most recent success was with SFZYT.
Good luck!
Steve