I like Tea Tree Oil Dry Grooming Spray. It smells lovely and has a natural insect repellent quality. I also have Shaws Coat Oil which is really nice but has to be used really sparingly as the coat goes really greasy if you overdo it

. I don't use them together.
If you are concerned about the chicken wings then mince them and put your mind completely at rest. Any butcher should mince them for you if you haven't got the means yourself. You could always give them chunks of another meat to chew on and large raw marrowbones that they can't swallow.