A lot depends on the pets lifestyle and living conditions, as a general guide. Dogs who have their hair cut in particular clips such as Poodles, Cockers, Lhasa Apsos, Shih Tzus, Bischons etc. should be groomed every 4-6 weeks. Bath dogs such as Labradors, Shepherds, Collies, etc. and cats should be groomed every 6-8 weeks.