I CAN TELL YOU FROM EXPERIENCE THAT IT DOES NOT GO AWAY WITH AGE. WE HAVE AN OLD BRUSSELS GRIFFON THAT WE BATTLED IT WITH FOR YEARS. UNTIL......WE HEARD A STORY FROM AN OLD TIMEY BREEDER THAT WORKED FOR US.
WE TRIED ALL KINDS OF TREATMENTS..MEAT TENDERIZER...IT MADE HER THROW UP FOR HOURS..(LIKE EATING POOP SHOULDNT) AND THEN GAVE HER THE RUNS....ALL THE TREATMENTS WERE MONEY DOWN THE DRAIN..(OR THE HATCH YOU COULD SAY) UNTIL THIS LADY TOLD US THAT IF YOU GIVE THEM ANISE SEED THEY WILL STOP WITHIN TWO WEEKS,,BUT THAT YOU HAVE TO BE DILIGENT. FIND A TREAT THAT THEY WILL EAT WITHOUT QUESTION. WE WOULD GIVE OUR GRIFFY A BALL OF CANNED DOG FOOD ..THEN ONE WITH THE ANISE SEED AND THEN ANOTHER WITHOUT....THERE IS SOMEWAY THAT THE ANISE MAKES THE YUCKY TASTE YUCKIER, AND SHE STOPPED AFTER YEARS OF IT......IT DID TAKE TWO WEEKS, AND I WOULD NEVER RECOMMEND DOING ANYTHING INCLUDING OVER THE COUNTER TREATMENTS WITHOUT FIRST CONSULTING YOUR VETRINARIAN , BUT I AM
HERE TO TELL YOU IT SURE WORKED FOR HER..AND WITH TWO YOU WOULD HAVE TO TREAT BOTH AT THE SAME TIME I WOULD THINK.GOOD LUCK, I KNOW IT IS A VERY DISTRESSING HABIT FOR THE OWNERS