My vet gave me Terramycin to use on Angel for his puffy red eye. He said it was herpes. His infection cleared up pretty fast. It has been one week now of using Terramycin and his eye is back to normal. The vet told me to use the ointment for 2 weeks. Is it okay to only use is for 1 week? His eye wasn't really bad to begin with and it is back to normal now. TIA.