Have Cat Questions? Ask a Cat Vet Online.
I am sorry to hear about your cats. I am a veterinarian and will do my best to help. I am sorry to see you have waited this long for help from an expert; I just came online and am seeing your question for the first time myself.
Do you mean Acyclovir, the eye ointment? If so, it can be used in cats, but most experts I checked with do not think it helps much. You can't give it orally to cats; it can cause bone marrow suppression.
Has doxycycline (oral) been tried, or Terramycin eye ointment?
Again, sorry for the wait. Let me know if I can help with anything else. Rebecca
How are your cats doing?