Yes I have been using the Flea Free on my outside strays. I put some in the water because it is too hard to make sure they get it in their food, too many feed at once. And I can honestly say that not 1 of them has had a tick on them yet!!!! So I just ordered more for my sisters’ critters. Thank you for the good things and food. My cats just LOVE it and of course my dog (Dozer) also loves the food and Jubilee biscuits.