Farm life

We lost another calf today. I am quite discouraged and down today. I feel like I didn't do enough and I am mad at myself for not knowing better. I keep saying to myself "you should have know that!" or "why didn't you do this/that?!" We even had the calf at the vet on intravenous fluids but there was just too much stress for his small body. I hate this part of having animals. Death is always a risk, but it never seems real until you are forced to come face to face with it. At least I can say we still have Sammy and the other brown holestein.