hi , just been going through the post's , on a falconry forum that iam a member of ;D , the falcon world is in termoil with a product that we as pigeon fancier's found was a doggy one , that being ( PANACUR ) , when using PANACUR to worm BOP it not only kill's the worm's , but also the BOP in a indirect way , by leaving a gatway open to secondry infection's in a high % of case's . they have found , loss of appetite is almost instant , bird become's listless , low white blood cell count , resulting in lowered immune system , and if not seen by a vet within 24hrs it a gonner , in most case's BAYTRYL is given as a cure , the falconry world are now using IVERMECTIN , same dose we use on our pigeon's , pigeon's treated with (PANACUR TAB'S or IVERMECTIN ) at the normal dose will have nil effect on BOP, but if taken directly that's another story ;)