[Snicker's Mom]

I used a complete flea and tick treatment on Snickers. One of those that you put on the skin from the shoulder blades to the tail. But he gets a bath every weekend. I bought some gentle shampoo from Cloud Star that has a "coconut shampoo base and all natural herbs and oils" hoping this would not strip off the treatment. I have found one tick on him since the treatment but it was just in his hair and not attached at the skin yet. No fleas either and he is outside ALOT. Should I take this as it is working ok?