Your dog might be suffering from some type of depression. You need to find the cause. Have you been frequently staying away from your dog? Try to show more love and affection to him and it may make a difference.
Go for a stuffed toy of good quality. If he likes a particular cartoon character or animal, it will be easy for you to select. Other than that, you can search for interactive dog toys. There are a lot of options available and you can choose one depending on his likes/dislikes.
I would say it is necessary to some extent. Grooming is not just about looks, it also ensures that your lovely pet stays healthy. Also, everyone’s life is stressful these days, including pets. So, it is important that the pets go to a spa once in a while and relax.