brought home a Kitten and he ended up having parasites. he was treated and cleared, then the other kitten of 6 months got sick and had a genetic viral infection and treated with clindrops. now the 3rd cat in the house a 4 year old is showing signs of sick because his whites in his eyes and 3rd eyelid are showing. I don't know what is going on if both others have been treated and cured. could the 3rd cat have gotten the genetic viral infection? can he be treated with the ClinDrops then?