Review on Royal Canin Persian Adult Dry Cat Food - 3 Lb Bag by Brian Forbis

I been feeding my 2 Persian cats with Costco Kirkland Signature dry food for years they always been very happy, and I been brush the cats once a week. than I adopt the 3rd Persian cat she was fed the same food with other 2, but after a few month the 3rd Persian got very greasy hair and had lost weight. I have tried some Persian Shampoo, it worked but greasy hair will come back later (by the way, I found really good cat shampoo.). Since I stared feeding my cats with this "Royal Canin Persian food" for one month I saw big change with they hair, after about 3 month the greasy hair is gone, and the other 2 Persian cats hair became very smooth and I brush them lease now.