How often to you trim the German Shepherd's nails? I have trimmed cats' nails and guinea pigs' nails, but never dogs' nails, especially all-black nails. I am scared to try since I was told that the only "catch" for my dog is that she hates having her nails done and might bite. I don't have a muzzle, but I suppose I could put the leash over her snout and hold it underneath. However, that makes it a two-person job and Chopper is still adjusting to my husband (she had a previous issue with men). I was at the pet store and saw that someone is doing $5 nail trimming on Sept. 8 but that seems like a looooong time. We have had Chopper for 3 weeks and usually I trim my cats' nails once a month.