Too late for my kitty......
By the way........what do you feed yours? True story here. Have been feeding mine Science Diet kibble........what we feed our other cats years ago. Was supposed to be the best on the market. So he starts puking yellow foam and being lethargic.........called the vet, she listened to symptoms, and asked what we were feeding him.
Seems that Science Diet is now including WAY more grains (ie corn) in their make-up. Of course we have a kitty sensitive to this (she says its getting more and more common) and it inflamed his intestines. So now we get to buy something called AVO which is entirely meat based. And guess what. Even the some of the canned food has grains.
Interesting.