My 11 year old Jersey cow almost died last year, when she had her 7th calf, from milk fever. It took 2 IV's about 8 hr.s apart to save her. The vet said she should not be bred back last year & now I'm wondering if it will be OK to breed her this year. She raised her own calf & 5 others & still has 2 on her. They are all fat & healthy now. She gets minerals free choice. I raised her from a baby, & we have 4 generations of of her daughters. None of them has ever had this problem before, & I'm not sure what I should do. Is it likely to happen again?