It is likely your cat has an upper respiratory or sinus infection that he just cannot shake. Somtimes the immune system can overcome these issues if it is strong enough. However, your cat needs a little help.
Have your vet put him on a two week round of clavamox. Then a week off. Then another two week round. That will eradicate the bacteria and resolve the mucus.
Also get him some digestive enzymes and probiotics at
www.AllergicPet.com. As that will boost his immune sysytem and enrich his overall general health.
After the month of medication your cat will be good as new.
Please let me know if I can be of any further help.
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