General Health

I have personally noticed that many kitties are suffering from upper respiratory aliments this past year. My Tina had a touch last February and Magellan never got it. So I was told by several vets that 250mg of Lysine per day would help the immune system and therefore prevent upper respiratory problems. So I am searching for any and all details and comments on this subject. My own observations are that Purina One, BG before grain and Blue dry cat foods have L-Lysine in their ingredients but not the canned foods which is what Tina eats mostly because she only has two teeth. I am planning to purchase L-Lysine tomorrow and give 250 mg. to each of the cats I feed to see if this does help. Your advice and comments are appreciated as well as any warnings or links for research. Thank you.

My 5 year old, female, russian blue has smallish bumps on the back of her neck and a cluster of even smaller bumps behind her ear. They seem to have just appeared and I'm not sure what could have caused them. Thoughts?