sick kitten upper respiratory

Hi all, A few months ago I went through the loss of my kitten Benni when she was found to have contracted wet FIP. Now a few months later down the road I have a spunky new kitten, Kramer, who has 10x the energy my last kitten ever had. I noticed the first day after picking up my new kitten...

My 6 month old blue tabby has been having upper respiratory issues since the end of August. I took him to the vet and he was put on clavamox, arithromycin eye ointment and now he's on amoxicillin and gentamicin eye drops. He goes through these weird huffing spasms and seems to either be trying...