Hi Corinne,
The pulse would suggest you need something more dispersing. Since the dog is raw fed, we automatically suspect Shao Yang disharmony, so putting those two things together, I would reach for Minor Bupleurum of some sort. Stomach Heat is a feature of Yang trapped in the Yang Ming. From there it passes to the Heart to create anxiety. CHJLGMLT has XCHT in it, but the dynamic is internalizing, not dispersing, so it's not as good a fit. The fact that his eyes cleared up tells you you're on the right track, though.
Pica for cloth sometimes indicates Phlegm and Dampness accumulation, but that is unlikely in a raw fed dog unless it's too cold for their Spleen (causing, for example, a low appetite). Another perhaps more likely possibility is that the dog is craving fiber, which is understandable in a raw fed Shao Yang disharmony dog. Much of the disease processes in Shao Yang raw fed dog stem from the absence of plant material in the diet. It should, to my mind, make up 1/6 to 1/3 of what is in the dish.
If Spleen deficiency does seem likely to you, then you can team Minor Bupleurum with Yi Yi Ren Tang to help address Dampness and Phlegm, as well as expel Wind Damp from where it might be causing cysts on the dorsum. You could also instead use Xian Fang Huo Ming Yin, if these cysts look substantial and are getting inflamed. You could even use all three together for complete coverage of the issues. Because they all take care of related problems, including two successive levels of pathogen invasion, they are compatible
Hopefully this helps you out!
Steve