WHEN MY 2 WERE PUPS I JUST BROUGHT THEM FOR WALKS AT THE CRACK OF DAWN WHEN ALOT OF RABBITS R STILL OUT AND ABOUT SHE WILL CHASE THEM 2 GROUND AND GET USED 2 THERE SCENT AND THE REST WILL JUST COME NATURAL IT WORKED FOR ME AND MY WHIPPET IS THE BEST DOG I EVER HAD FOR IF HE MARKS THERES RABBITS THERE.YOUR BICH HAS COLLIE IN HER SO U SHOULD BE OK AS THERE GOOD MARKERS.