There are a few steps you can take to help stop your Abyssinian cat from excessive meowing or scratching furniture:

1. Provide enough stimulation: Abyssinian cats are active and intelligent, so it’s important to provide them with plenty of mental and physical stimulation. Make sure they have plenty of toys to play with and engage in interactive play with them every day.
2. Provide a scratching post: Scratching is a natural behavior for cats, so it’s important to provide them with a designated scratching area. This can be a scratching post or a scratching pad, and it should be sturdy and tall enough for them to fully extend their bodies.
3. Establish a routine: Cats thrive on routine, so establish a consistent feeding and play schedule for your cat. This can help reduce stress and anxiety, which can contribute to excessive meowing.
4. Address any medical issues: If your cat is meowing excessively, it’s important to rule out any underlying medical issues. Take them to a vet to rule out any pain or discomfort that may be causing the behavior.
5. Provide a calm environment: Make sure your cat’s environment is calm and quiet, and avoid sudden changes that could cause stress. A calming pheromone diffuser can also help reduce stress.
6. Ignore the behavior: In some cases, excessive meowing or scratching can be attention-seeking behavior. If you consistently respond to the behavior, it may reinforce it. Instead, try ignoring the behavior and only rewarding calm and quiet behavior.
7. Provide positive reinforcement: When your cat engages in desirable behavior, such as using a scratching post or being quiet, be sure to reinforce it with treats and praise. This will help them learn what behavior is appropriate.
8. Consult with a behaviorist: If the above steps don’t seem to help, consider consulting with a feline behaviorist. They can help you understand your cat’s behavior and provide specific recommendations for addressing the problem.

It’s important to remember that every cat is unique, and what works for one cat may not work for another. Be patient and persistent, and try different approaches until you find what works for your cat. With time, patience, and consistent training, you can help your Abyssinian cat stop excessive meowing and scratching.