Trimming the nails of a Russell Terrier at least once a month, is highly recommended. If they are too long, it will make him uncomfortable when he walks, and if you have hardwood floors, you won’t appreciate the scratch marks untrimmed nails will make. If you hear a tapping sound when your Russell walks on your wood or tile floors, that means his nails need a trim. Generally, a dog’s nails need to be cut every three to four weeks. However, if your Russell walks on hard surfaces like sidewalks and concrete, he may not need his nails cut as frequently.