Yesterday a Holstien/ Angus cross cow bred to an Angus bull had a black heifer with absolutely no tail. No stub, no nothing. Typically this would humorously unique, but last year she had a big bull calf that had scar looking streak down his belly and could not urinate. It had to be destroyed. She has had well over 8 calves and these two were the only ones extraordinary in anyway. Does anyone have any info on whether or not there is an association or if it is a coincedence?