There are several ways to get rid of the dog gland smell on furniture. First, you can wash any fabric-covered furniture pieces with a detergent designed for pet odors to help remove the smell. You can also vacuum the furniture, which can help remove any loose hair and odors from the material. If the smell is lingering, you can try using a pet odor removing spray. Try to spray the furniture from a distance, so that the spray doesn’t saturate the material, and then allow the piece to air dry. Finally, you can also place activated charcoal in an open container on the furniture for a few days, which can help absorb the odors.