To answer all the questions - for $10, it's worth trying! I think drier areas like mine call for a little extra help.

Mary, ask your vet. There are capsules for cats - but as I have two larger kitties *ahem* they get the pump style in their wet food. One pump per day for a medium dog = two healthy kitties!

I mix it in their wet food - I had to also mix in a bit of stinky food at first, but now I don't have to do that.