Blu-Kote Dauber (4 oz.) - Fast Drying Antiseptic Wound Dressing

I have this for my dogs. Works great! I noticed that the purple stain stays for a long time and was wondering if I could use it to dye my hair.

does it work on horses?

does blu-kote expire

Can I use this on a healing chick and put her back in with the others or do I still need to wait for her to fully heal?