Before you begin any repairs, it’s essential to assess the extent of the damage:

1. Identify the Affected Areas: 

Check if the damage is limited to a small section, such as a cushion, or if it has affected a larger area like the frame or upholstery.

2. Examine the Material:

 Determine the type of fabric your couch is made from (e.g., leather, microfiber, fabric blends) as this will influence your repair method.

3. Check the Structure: 

If the couch has a wooden frame, inspect it for any structural damage that may need addressing before focusing on the upholstery.

1. For Minor Chewing and Fraying

If your dog has simply chewed on the edges of the couch or caused some fraying, there are several methods to repair it:

- Fabric Glue: For small frays or tears, use fabric glue to hold the edges together. Apply a small amount to the frayed area, press the fabric together, and let it dry according to the manufacturer's instructions.

- Sewing: If you’re comfortable with a needle and thread, you can sew up small tears. Use a needle that suits your fabric type and thread that matches the color of your couch.

- Patch Kit: Many upholstery stores offer fabric patch kits. Cut a patch to size and use fabric glue to attach it over the damaged area, ensuring it blends well with the surrounding fabric.

2. For Larger Chewing Damage

For more significant damage, you may need to take more extensive measures:

- Replacement Cushion Covers: If the cushions are the main problem, consider replacing the cushion covers. You can find replacement covers online or at home goods stores, often for a fraction of the price of new furniture.

- Reupholstering: For more extensive damage, reupholstering may be necessary. This can be a DIY project if you’re handy or you might consider hiring a professional. Choose a durable fabric that can withstand future wear and tear.

3. Repairing Leather Couches

If your couch is made of leather, the repair process will differ slightly:

- Leather Repair Kit: Purchase a leather repair kit, which typically includes adhesive, color matching compounds, and a sealant. Follow the instructions carefully for the best results.

- Coloring: If the chew marks are deep, you may need to use a leather dye to restore the color. Test it on an inconspicuous area first to ensure a good match.

If your couch's frame has been compromised, here are steps to take:

1. Assess the Frame:

Check for broken legs, loose joints, or damaged support beams.

2. Use Wood Glue:

For loose joints, apply wood glue and clamp the joint until it dries.

3. Reinforce with Brackets:

 If you find structural weakness, consider using metal brackets to provide additional support.

4. Replace Legs:

If any legs are chewed off or broken, consider replacing them. You can buy new legs or make your own from sturdy materials.

After you've repaired your couch, it’s essential to take steps to prevent your dog from chewing again:

- Training:

Teach your dog basic commands like "leave it" or "no." Consistent training can help discourage destructive behavior.

- Provide Chew Toys:

 Ensure your dog has plenty of appropriate chew toys to satisfy their need to gnaw.

- Create Boundaries:

 Consider using baby gates to keep your dog away from the couch when you’re not able to supervise.

- Deterrent Sprays:

Use pet-safe deterrent sprays on the couch to discourage chewing. Many dogs dislike the taste and smell of these sprays.