Related Experiment Videos
Summary
High milk-producing dairy cows fed excessive copper sulphate developed chronic copper poisoning. Symptoms included jaundice and liver damage, leading to death within days of illness onset.
Area of Science:
- Veterinary Medicine
- Animal Nutrition
- Toxicology
Background:
- Copper is an essential trace element for dairy cattle, crucial for various physiological functions.
- Supplementation is common in dairy herds to meet nutritional requirements and enhance productivity.
- Excessive copper intake, however, can lead to toxicosis, particularly in high-producing animals.
Observation:
- A dairy herd experienced chronic copper poisoning linked to supplementary copper sulphate feeding.
- High milk-producing cows received a higher dose (22.0 g/day) compared to others (11 g/day).
- Within six months, three high-producing cows exhibited severe clinical signs and succumbed to the condition.
Findings:
- Clinical signs included anorexia, decreased milk production, frequent recumbency, and jaundice.
- Post-mortem examinations revealed dehydration, anemia, jaundice, significant liver damage, and intestinal hemorrhage.
- Analysis of liver tissue showed elevated copper levels, ranging from 1,250 to 2,410 ppm dry matter.
Implications:
- This case highlights the risk of chronic copper poisoning in dairy cattle due to excessive supplementation.
- Dosage adjustments based on milk production levels are critical to prevent toxicity.
- Monitoring liver copper levels can aid in diagnosing and managing copper toxicosis in herds.