You might think that I could tell if the bottle was empty by just holding it, but not so. Like I said, the bottle is made of thick plastic and it’s difficult to tell how much is left in it by holding it or even by shaking it. Did they necessarily have to use such thick  and opaque plastic to hold this medicine? Well, on the safe side I bought another bottle to have in the house, just to be prepared once this one’s empty. After all, I don’t want to miss even a day, of adding it in their food. I definitely don’t want Lucy, or any of my cats suffering through that pain again.