Herbal Treatment

[Loraine]

I have Zedley on stuff from Robert McDowell for his itchy, red skin. His skin is clearing up, but I have noticed that he is getting more black spots on his skin [pigmentation is changing]. These changes are not itchy or anything, but I am curious as to why thei may be happening. I have emailed RMcD and they want me to send a pic of Zedley. The main areas of change are under all four armpits (sorry don't know what they are called on dogs) and a few more on his back that before the treatment.

Does anyone have a clue what this might be? I am not bothered about these new black marks, but I am very curious. Zedley's skin is mostly white/pink with black areas (his fur is mainly white with black patches and a tan face and ears. TIA