Urea intoxication in the dairy heifers
1985
Thirapong Thirapatsakun | Archariya Kanchanatep (Chulalongkorn Univ., Bangkok (Thailand). Faculty of Veterinary Science. Dept. of Veterinary Medicine) | Boonme Sanyasucharee
Twenty four dairy heifers were raised on concentrate mixture which included tapioka, soyabean-meal, bran and on fresh grass. Urea was also used as a supplement for protein in a form of urea-molasse solution sprayed on the feed. On one occasion, seven heifers in the last three successive stalls had developed signs of anorexia, generalized edema, scanty pasty feces, proteinuria and died within 5 to 11 days. Post-mortem findings and other circum-stantial evidences such as rumen pH (between 7.5-8.0), strong odor of ammonia in the rumen, severe nephrosis and a slight tilt of feed trough towards the stalls where the affected heifers were placed suggested that urea intoxication was the cause of death.
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