Well, I only started giving it to her on Mon (she hadnt' been limping much until then), and I know when the others have had to have it, they had to have 3 drops for 2 days, then go down to 2, then one, I started her off on one, so will give her another couple of days on two first. Teh vet did say to give her a week on it, which would be next Mon. She is fine in herself though, she has been going out, eating well, and cos I haven't been well this week, curling up on the sofa against my legs.