I have an older cat that has had a bad problem with her sinuses. We tried everything to help her and nothing worked. I came here to Earth Clinic to see what I could do for her. I tried the L-Lysine 500mg as advised. Just one treatment and the cat could breath without trouble the next day! I am so amazed! I will give her this product 3 times a week as advised. I used 500mg (I crushed the pill) and rolled moist cat food in the crushed L-Lysine. Our cat didn't like the taste because she left a quarter of the cat food. (She loves this cat food) But it worked anyway! The next time I gave her the dose in her moist cat food she ate it all! I can't get over how well it worked on my cat! We nearly put her to sleep because she was suffering so much. Thank you Earth Clinic!