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Title: We can tell this makes a big difference
Review: We have a beagle with high anxiety. He compulsively licks things, will bark and whine for apparently no reason, and can be destructive. We've been using these plug-ins for a couple years now and while it doesn't eliminate these behaviors, we can tell it makes a big difference. Now, whenever our beagle starts acting extremely high strung, whining for no reason, etc., we almost always discover that the refill in the plug-in is empty. We try to keep refills on hand so we don't have to make emergency trips to the pet store for more. These definitely have a calming effect on him and now we can't live without them. The only bad thing about it is that these are expensive, and you have to change the refill every month.
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