I have hung a soda can with some coins in it on the knob of a door I didn't want my dog to scratch. That worked pretty well, because he hated the coin jingling noise.

Using a really good primer (not the quick-dry kind) is important in painting window trim.

Wish I had more suggestions, but that's all I can think of.

Go get yourself a piece of acrylic, measured to the size you want and make a way to attach it to the wall where you need the area protected. Or you can train your dogs to stay off.....either way will work

I heard about the following product on the Home Decorating forum. Maybe it'w worth a try.

I no not work for this company!

Here is a link that might be useful: Sill Shield

We also have this problem - and I also thought of Plexiglass. But I went to Staples and bought some Bristol Board which I then proceeded to tape against the wall under the "favoured" window - using 3Ms blue tape - the one that can be used for 14 days without taking off paint - and then I put pieces of tape across the sill where the claws of death grip. Doesn't look great but it works. We have a 22 lb. American Eskimo - with long legs. But he has to hold on to the window sill in order to look out - and bark. This is Plan A - and probably Plans B - Z. So far so good.

When my dog was scratching the door I put some sheets of really rough sandpaper right where she scratched, she quit within a couple days and didn't start again even after I took the sandpaper down.

Leafgreen............I hope the producers make a mint on this one. It's an idea whose time has come. I can't even imagine how difficult it must be for renters, who have animals and how they must live in fear of that kind of damage.