It seems easy to keep the dog away from the sofa. Dogs also have personalities, some are docile, some are naughty, some are grumpy, and some even like to fight with others. No matter how good the pre-training, smart and naughty dogs may sneak onto the sofa when you are not at home. So I suggest buying a set of sofa cushions and bathing the dog often. If you really love this dog, you shouldn't be afraid of its hair loss or its saliva. If you want to completely eliminate it, you can only keep it in captivity. If there is a yard, you can't let it in.