Visited a herd in County Limerick today of about 250 cows. 25% of cows that were eligible for service were not detected in heat. It was interesting that all cows were anoestrus.Body condition score on the cows was not low- cows would have been fit for breeding on general observation. Locomotion scans were excellent. Body condition score ranged from 1.75 to 2.5 but further questioning of the client showed that the main issue on the farm in recent weeks has seen a significant decrease in butter fat percentages of milk which would concur with aceponemia in the cows and this in turn would have resulted in cows to stop cycling or not to begin cycling post calving. All of the cows presented on this farm were greater 50 days calved.