And just possibly try a little plain non fat yogurt - organic preferably, for the probiotics. Most of the immune system is in the gut and strenghtening the healthy microbes in the gut may boost the whole immune system. Again, I gave my cat some plain yogurt mixed with a little lukewarm water in a syringe (without needle kind) in his mouth a few times a day, just to get it in him and it did seem to help. Very best wishes and sending positive vibes your way.
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