I just don't know weather these vitamins are helpful or not because I'm giving them to my cat only three days now. But! I'll give a 5-star rating because it's fish oil, so necessary for health (humans and animals as well) even if I will not see any changes in skin / fur condition in future, I still know that these vitamins are acting positively on many aspects as heart, circulation, digestion etc. Before purchase I have read many reviews on this product and my important message for all pet owners who have concerns weather their pet will like it or not: my cat didn't like it in a bowl (on the floor) (even though she likes to lick an olive oil from her bowl), she didn't like it on her food either... strange, but only way she likes it - to lick it from my fingers. I think if your pet is choosey one, you should try this kind of oily vitamin offer.