One of my bearded collies suffers from SLO. This supplement was recommended to me by another owner whose bearded also suffers. At diagnosis at 17 months,, along with antibiotics, he had to take a large amount of pills each day. Since taking two of these pills a day and not now needing the antibiotics, his nails are growing as well as a SLO sufferers can. Our vet checked and confirmed the pills contained the same supplements that I was having to give separately hence so many pills. He is now just over three and is so much happier, he is able to run about and play with our other beardie without yelping in pain. I've recommended Dermal 03 to many Bearded Collie owners. I think it's an amazing supplement. Always delivered very quickly and any queries are responded to promptly.