Identity crisis
The “cow towers over other cattle in his herd”.
If these facts can be verified we are witnessing a biological, if not a moral, revolution. This unfortunate animal must surely have a crisis of sexual identity. There may be another practical problem as well for the hapeless beast, as your report goes on to say his owner “has been unable to find a cow even near his height”. But then if he/she/it is a bullock, I guess that problem does not really arise.