This thread is interesting since the only warnings iv'e read or heard say that it (calcium borogluconate )is very safe except if you give big dose's on say a daily basis, then the kidney's will fail or if you give it into a vein ( normally cattle ) not warmed and you push it in too quickly ( normally use a butterfly valve and gravity ) then it can kill . I have spoken to two vets and the manufacture ( norbrook ) and they have confirmed the above , and that a calcium dose will not harm at recommended rates . The product is recommended for use i cases of Hypocalcaemia Hypomagesaemia Pregnancy Toxaemia Cervixal Prolapse Ringwomb . Hope this is ok