BSE has a long brooding period, around 2.5 to 8 years, generally influencing grown-up steers at a top age onset of four to five years, all breeds being just as powerless. BSE is brought about by a misfolded proteinâa prion. In the United Kingdom, the nation most noticeably bad influenced, more than 180,000 steers have been tainted and 4.4 million butchered. Dairy animals influenced by BSE are normally separated from the crowd and will indicate logically breaking down behavioral and neurological signs. One prominent sign is an increment in hostility.