favorite grooming tool?

I use a double sided brush, Safari W6152, and if I need it a wide bristle comb that combs out the undercoat when my collie pup is blowing his coat spring and fall. Fortunately. he is very patient, has been trained to be by short sessions with treats and play that have accompanied grooming in the first year. It is never too late to train the collie that grooming=love (~:
Rev. Maryanne