I bought yogurt drops for rabbits one day and gave our little Dutch Rabbit(5 yrs old) one. She went nuts over it. My four cats ranging in age from 1 yr to 13 yr. The cats wanted some too. I gave them one each. I couldn't believe how fast they gobbled them up. I asked my vet if feeding these rabbit treats would harm the cats. He said it would be okay but follow instructions stated on the package. Now, all I need to do to get them to come to me AT ANY TIME is say, "TREAT TIME" and they come running!!!