Why Pet Damage Is Different
The first thing I got wrong was treating pet damage like regular dings and dents. It's not the same. When a dog chews a corner, the damage isn't just cosmetic. The paper face of the drywall gets shredded along with the corner bead, which means you can't just refill the gouge and call it done. You're rebuilding the structural edge.
Scratch damage from claws works differently. Dogs that scratch at doors usually damage the corner where the doorframe meets the wall, and you get a series of parallel grooves across the paper face. These look minor but they expose the gypsum underneath, which absorbs paint inconsistently and crumbles if you try to sand it flat.
Impact damage from a dog hitting a wall at speed creates dents similar to furniture impacts, but the gypsum often cracks in a hidden pattern under the paper. You see a small dent and assume it's a quarter sized fix, then realize the cracking extends six inches in every direction.
The Corner Bead Disaster
Murphy's first project was the outside corner next to my back door. The original corner had metal bead under the mud, and he managed to strip the paper face down to the metal in a vertical strip about eight inches long. He had also chewed the metal itself into a wavy pattern that I had to cut out with tin snips.
My first attempt at the fix was to just mud over the damaged area and hope. Within a week the mud was cracking along the corner because there was nothing structural underneath it. The metal bead had been deformed by his teeth and was no longer providing a clean edge.
The second attempt was the right way. I cut out the damaged section of corner bead with my oscillating tool, removed about a 12 inch length of metal, and installed a vinyl corner bead replacement. Vinyl is what I would have used originally if I had built the house, because metal corner bead in a high-traffic area near a pet is a long term problem. The vinyl bead went on with adhesive and a few staples, then I bedded it in with all-purpose compound and feathered it out wide.
Total time on the do-it-right version was about three hours spread over two days. Materials were under $20. The first attempt I'd put $4 of mud into the wall for nothing.
The Shoulder Dent
About a year after the corner repair, Murphy heard a delivery driver at our front door and came sprinting around the corner from the kitchen. He misjudged the turn and slammed his right shoulder into the hallway wall. I heard the impact from my office and came out expecting to find him injured. He was fine. The wall was not.
The dent was maybe three inches across and a quarter inch deep. The drywall paper was crumpled inward but not torn. My initial assumption was a quick spackle job and I'd be done in an hour.
When I pressed around the dent with my finger, the wall flexed in a way that told me there was hidden cracking. I cut into the damaged area with a utility knife and confirmed it. The gypsum behind the paper had cracked in a star pattern about six inches across. The paper face was holding it together but the structural integrity was gone.
The fix required cutting out the damaged section, installing a backer board, fitting a small drywall patch, taping the seams, and three coats of mud with sanding in between. From start to finish it took about six hours over three days, mostly dry time. Materials were $15. If I had just spackled the visible dent, the area would have cracked again within months.
Scratch Damage From a Pet Door Issue
My neighbor Christine Wagner called me last spring because her cocker spaniel had scratched the area around their pet door insert. The door itself was fine but the dog had clawed at the wall on either side of the flap, leaving parallel grooves about six inches long on the right side and a few shorter marks on the left. The damage went through the paint and the paper face, exposing bare gypsum in places.
Christine had tried to fix the scratches with paintable caulk, which is what most pet damage articles online suggest. The caulk filled the grooves but couldn't sand smooth. She ended up with a bumpy patch that looked worse than the original scratches.
The actual fix was to skim coat the entire damaged area with joint compound, sand it flat, and repaint. Caulk doesn't sand. Joint compound does. For scratches that go through the paper face, you need a material that can be feathered out and brought flush with the wall surface.
I spent a Saturday morning at her house doing the skim coat, came back the next day to sand, and she handled the painting herself. The whole repair cost her about $25 in materials. The previous caulk attempt had cost her $8 plus the time and frustration of trying to make it look right.
What Actually Stops the Damage
None of these repairs matter if you don't address the cause. After Murphy's corner bead incident, we put a piece of plexiglass against that corner for six months while he outgrew the chewing phase. It looked ugly but it worked. The corner has been intact for over two years now.
For the sprinting impact damage, we changed where his food bowl lived. The hallway was his sprint path because the doorbell triggered him to run to the kitchen for some reason I never understood. Moving his bowls to a spot that didn't require running through the hallway eliminated about 90% of his impact incidents.
Christine put a small piece of clear acrylic on either side of her pet door after the repair. The clear material is invisible from a few feet away and protects the wall from future clawing.
Yusuf's rabbit baseboard solution was to add a wire mesh barrier behind the molding. Rabbits chew everything within reach and the only real fix is to put a physical barrier between the rabbit and the wood or drywall.
Drywall repair is permanent only if the cause is fixed. I've watched friends fix the same pet damage three times because they kept letting the dog into the same room with the same access.
When to Call a Pro
Most pet damage I've encountered is firmly in DIY territory. The repairs aren't structurally complex and the materials are cheap. But there are situations where I would tell someone to hire it out.
If the damage covers more than about 18 inches of corner bead, replacing the bead becomes a precision job that benefits from someone who does it every day. The replacement can be done DIY but getting a clean transition between old and new bead is harder than it looks.
If there's water damage along with the pet damage, like a dog repeatedly licking the wall behind a water bowl, the affected drywall may have mold or weakness that needs evaluation. I'd cut into it to see what's underneath, and if I found anything concerning, I'd call someone.
If you don't enjoy this kind of work, hiring it out for a few hundred dollars is reasonable. A pro will charge $200 to $400 for typical pet damage repairs in my area. The fix is the same as DIY but they'll have it done in half a day rather than spread over a week of dry times.