| Culling and wastage in dairy herds: an update on incidence and economic impact in dairy herds in the UK PG Orpin, RJ Esslemont Cattle Pract 18 (3), 163-172, 2010 | 59 | 2010 |
| Clinical management of traumatic reticuloperitonitis in cattle P Orpin, D Harwood In practice 30 (10), 544-551, 2008 | 34 | 2008 |
| Predict and prevent versus test and treat P Orpin, D Sibley The Veterinary Record 174 (16), 403, 2014 | 14 | 2014 |
| Potential avermectin resistance in a cattle herd P Orpin The Veterinary Record 167 (2), 69, 2010 | 11 | 2010 |
| What can we learn from farmers experiences and attitudes to Selective Dry Cow Therapy P Orpin Cattle Pract 25 (PART 3), 130-9, 2017 | 9 | 2017 |
| Johne's disease in dairy herds 2. Effective control using the National Johne's Management Plan P Orpin, D Sibley, K Bond In Practice 42 (3), 159-168, 2020 | 7 | 2020 |
| Johne's disease in dairy herds 1. Understanding the disease P Orpin, D Sibley, K Bond In Practice 42 (1), 39-46, 2020 | 7 | 2020 |
| Dairy UK Johne’s survey–winning farmer engagement P Orpin Cattle Pract 25 (3), 2017 | 7 | 2017 |
| Traumatic reticuloperitonitis in cows P Orpin The Veterinary Record 160 (23), 811, 2007 | 7 | 2007 |
| Myhealthyherd. com: a web based system to improve cattle health. PG Orpin, RJ Sibley | 7 | 2007 |
| Operation Johne's–preliminary results from a Johne's engagement programme in the UK PG Orpin, RJ Sibley, HL Pearse Cattle Practice 19 (Part 2), 149-154, 2011 | 6 | 2011 |
| The use of targeted sampling and risk factor analysis to investigate the presence of Johne's disease in dairy herds. P Orpin, S Duthie, DH Grove-White | 6 | 2005 |
| The influence of tuberculosis testing in dairy cattle on milk ELISA tests for Johne’s disease H May, P Orpin, H Pearse, P Jones, H Clough | 5 | 2016 |
| A voluntary Johne’s engagement programme in UK dairy herds PG Orpin, RJ Sibley, E Komorowski Proceedings of the 3rd ParaTB Forum, 10-21, 2012 | 5 | 2012 |
| Novel Approaches to Johne’s disease in Dairy Herds PG Orpin, RJ Sibley, HL Pearse Cattle Practice 17 (Part 2), 156-160, 2009 | 5 | 2009 |
| Analysis of Map antibody in milk samples. S Duthie, P Burr, H Mills, P Orpin, D Snodgrass | 5 | 2007 |
| The art and science of managing clients P Orpin In Practice 17 (10), 487-489, 1995 | 5 | 1995 |
| An update on the progress of the UK National Johne’s Management Plan and InterHerd+ Johne’s Disease Tracker P Orpin, D Sibley, K Bond, E Taylor, J Hanks, N Taylor Bull. Int. Dairy Fed 523, 56-67, 2023 | 4 | 2023 |
| The National Johne's Management Plan: using risk and data analysis to optimise Johne's control in dairy herds PG Orpin, D Sibley, J Hanks, N Taylor Livestock 27 (1), 24-29, 2022 | 4 | 2022 |
| Counting the culls and costing the casualties-not all cull cows are the same PG Orpin, RJ Sibley Cattle Pract 22, 200-5, 2014 | 4 | 2014 |
