JAS I AGREE WITH WHAT YOUR SAYING ABOUT TEST THEM YOUR SELF BUT WHAT IF THEY HAVE GOT THIS AND THAT WRONG WITH THEM..AND THEY NEEDED TREATING WITH ANTIBIOTICS,,,WERE WOULD WE GET THEM FROM COS I NO AS A FACT ALOT OF PRODUCTS WE BUY FROM OUR LOCAL PIGEON SHOPS AND OF THE NET HALF OF THEM DONT WORK THEN WEVE WAISTED OUR TIMES BUYING THEM WHEN WE COULD OF USED ANTIS FROM THE OF ..JOB DONE M8....IVE LEARNT ALOT THIS YEAR,,MORE THAN I HAVE IN 12 YEARS OF KEEPING RACING PIGEONS...THERES ALOT OF CRAP ON THE SHELVES THAT DONT WORK...PLUS EVERY ONE ONE SAYING DONT USE ANTIS WHILE THERE IN FULL MOULT..BULL sh**...ITS THE BEST MINE HAVE EVER MOULTED THREW WITH USEING ANTIS TO GET RID OF SOME THING...WHICH HAS WORKED A TREAT....CHEERS...MARK..