I've never been fond of using the bitter sprays on cords. Yes, they might get a nasty taste, but it might also be too late if they have already sunk their teeth into the cord!
Every cord in my house is protected using one of two methods. One is a raceway system, it can be a little more expensive, but it's worth it when you want the result to look good, it allows you to run cords along baseboards and around corners, etc.
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The other stuff I use is called "split loom" tubing, it's a hard plastic shell that covers the cord completely:
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Don't get the kind that looks like this:
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It's more of a helical design, and kitty teeth can still get between the gaps.
You should be able to get any of this at a local hardware or home improvement store. Or search Amazon.