Our little female Manx is 13 years old, and she gets gabapentin for pain, along with another arthritis med because she's just not jumping up onto anything like she used to. So we got this in the hope that she would start using it right away. But if you know anything about cats, you know how they just kind of ignore change. But we've left it at the foot of the bed, because we know that, someday, she'll figure out what it's there for and begin using it.