Bought a young 4ish old cow 3 months ago from sale barn for $750 3rd trimester pregnant. Cow was skinny , she gained weight and had the calf. Calf seemed weak and had sucken blueish eyes. Today the calf died , 2nd day. I am unsure if I should sell her? Give her antibiotics and re breed her? Also noticed her teats were large. I have included pics. Any advice ?