This is the only all-natural collar to make this list. Clove is one of the ingredients that gives off a strong scent.
You may want to open the packaging and let the collar air out for a day before putting it on your dog.
I would give this collar a try once my dog was rid of fleas just to give him a break from insecticides.
Pros
No harsh chemicals
Repels up to 4 months
Diffusing collar offers no-mess application
Fragrant scent
Cons
Will need to use with a flea killing insecticide for comprehensive treatment
Even natural ingredients can cause allergic reactions in some dogs
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