Animal

SDC10021.JPG

Animal health issues were monitored over the period of the trial. In particular methods of controlling mastitis without antibiotics were intensively investigated along with the prevention of parasitism in organic calves without the use of anthelmintics. Mastitis required an integrated approach the application of which culminated in the organic herd exhibiting the 44th lowest bulk cell count for the 2009/10 season nationwide and the conventional herd the 56th lowest. The prevention of parasitism hinged on a grazing strategy which avoided the exposure of calves to the autumn larval peak. This was very successful but depended critically on management at the onset of autumn rains.  Monitoring of mineral status of both herds showed differences with generally the organic herd performing better in this respect. However, regular selenium supplementation (and occasionally copper) was required for both herds throughout the trial period.

Animal health issues were monitored over the period of the trial. In particular methods of controlling mastitis without antibiotics were intensively investigated along with the prevention of parasitism in organic calves without the use of anthelmintics.

Mastitis

Mastitis required an integrated approach the application of which culminated in the organic herd exhibiting the 44th lowest bulk cell count for the 2009/10 season nationwide and the conventional herd the 56th lowest. The prevention of parasitism hinged on a grazing strategy which avoided the exposure of calves to the autumn larval peak. This was very successful but depended critically on management at the onset of autumn rains. 

Minerals

Monitoring of mineral status of both herds showed differences with generally the organic herd performing better in this respect. However, regular selenium supplementation (and occasionally copper) was required for both herds throughout the trial period.

Papers

A Longitudinal study of mastitis.pdf (38 KB)

A study of mastitis in two small experimental dairy herds.pdf (143 KB)

Animal health infosheet mastitis.pdf (116 KB)

Are organic cows less stressed.pdf (88 KB)

Article Rearing heifers DCRU.pdf (235 KB)

aspirin study.pdf (35 KB)

Comparison of mastitis prevalence between an organ.pdf (139 KB)

Dobson-Hill Thesis.pdf (692 KB)

Frequency of mastitis and variation in SCC throughout lactation.pdf (20 KB)

Influence of management techniques on levels of mastitis.pdf (30 KB)

Microsoft Word - Manuka honey and mastitis v2.pdf (243 KB)

Production Measures Up - NZDE article 09-12.pdf (593 KB)

Posters

Are organic cows less stressed - Poster.pdf (1,438 KB)

Mastitis - A comparative Study.pdf (316 KB)

Rearing heifers without drenching.pdf (186 KB)

Presentations

A Longitudinal study of mastitis - Presentation.pdf (775 KB)

A Study of Mastitis in two small experimental dairy herds - Presentation.pdf (71 KB)

Controlling Mastitis on Organic Farms2.pdf (2,133 KB)

Influence of management techniques on levels of mastitis - Presentation.pdf (344 KB)

Industry Articles

Similar milk yields for two systems - NZDE article.pdf (164 KB)

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