"My cat is sooo finicky, if you drop a shrimp in front of her, she'll rarely eat it. So I'm used to her snubbing all the different cat treats I try. But she actually really likes these! She'll even chase a rolling treat across the floor now. I'm not sure about the anti-hairball action. She hasn't had any hairballs when I give her the treats. But I went away for a 3 day weekend and came home to a hairball, so I guess the effects are only short term. Still I recommend it simply because it's an easy way to get her to eat her omega-3's."