I hope you will find the following as interesting as I did:

My homoeopathic vet prescribed Staphysagria for my neutered male cat who had started spraying (marking territory) INSIDE the house and not just in the garden.
On the 3rd day of treatment (5mls twice a day) he completely stopped spraying indoors but continued his normal territory marking in the garden.

About 6 years later, I again got this remedy for him for exactly similar symptoms and again, it worked immediately and totally.

How specific and impressive a result from a remedy!