Crittercord works as advertised, but the solution is worse than the problem — the smell is unbearably foul. It reminds me of the nauseous odor of hair curling preparations. Everyone in the house complained about the penetrating stench.
I told my friend Sean Ragan about my gnawing cats, and he recommended ¼-inch split loom tubing. For $12 I was able to buy a 100-foot roll, which is more than enough for all of our laptop power cords. It has no odor, and it works beautifully. The cats want nothing to do with it. Perhaps the tubing doesn’t have the right mouthfeel or pleasant-smelling plasticizers that my cats love.
The tubing is flexible enough that I leave it on the power cord when I travel. — Mark Frauenfelder
American Terminal SL250-100 1/4-Inch Split Loom Tubing, 100 feet $12