The original flock was established by owners Bill & Lynne Duffield in 1965.
Through the years, ewes were purchased from such flocks as MSU and Culham. In 1991 the flock was closed to purchasing ewes from outside the farm. Rams to service this flock were purchased from test station sales in Canada and the USA such as Ontario, Alberta, Iowa, and Illinois. One of our studs was a son of Country Music, the third certified meat sire in USA. We closed the flock to bringing in outside live rams in 1994 and switched to new genetics of frozen ram semen by the use of AI only. This means under Ontario Ministry of Agriculture and Food (OMAF) definition that the flock is a totally closed unit. In 1999, we used the Third Ontario Suffolk Reference Sire ram and two of our own ram lambs of which one was an AI ram using the data from Sheep Flock Improvement Program of Ontario (SFIP) now GenOvis, and Lambplan from Australia.
We were one of the original flocks putting rams into test stations in Ontario and the only Canadian flock to test ram lambs at the Ohio Station, USA. Our rams have been at/or near the top of the Suffolks at all these stations.
Since we are a strong supporter of healthy sheep we took lambs to the test station for carcass class only so we do not bring ram lambs home that have been exposed to animals from other farms.
Several years ago our carcasses averaged a 2.96 square inch loin eye at 110 days from birth to slaughter. We used Glanvac-6 and culling to prevent and eradicate any caseous lymphadenitis (CL) in our flock and there has been no signs of CL for many, many years.
In 1990 our flock was ELISA blood tested for Maedi Visna (OPP) and at that time we had no reactors. Every year since we randomly sample 10-15% of the flock to monitor our Maedi Visna free status. We are into our twenty-second year of testing of Maedi Visna and have never had a positive ireactor.
Over the years our ram lambs have been used at United Breeders in Guelph, at the New Liskeard flock (dispersed), and Centre d'insemination ovine du Quebec (CIOQ) (dispersed also) and by serious commercial breeders. Before entry to the Quebec AI stud, the rams were tested for 7 diseases and were all negative. In 1997, we started scanning all our lambs around 100 days of age for back fat and loin eye depth. We have been blood testing for the spider gene on our stud rams to verify that our flock is completely free of this problem and codon test as well. In 1999, we were one of the first farms to join the Ontario Sheep Health Program (OSHP) having a producer # 0001.
We have met the specifications for a eighth year for the Ontario Sheep Health Program Certificate Level 1, issued September 18, 2006. In Level II, Maedi-Visna Section (OPP) we are now classified "A" with all animals including 180 days and older lambs being negative. This flock currently is the only registered Suffolk flock in all of Ontario that is recognized under the Ontario Veterinarian College (OVC) at the University of Guelph, the Canadian Food Inspection Agency (CFIA), and the Ontario Sheep Marketing Association to attain this level.
Codan Suffolks since 2003 to 2009 every year has blood tested 10% of all aged ewes and these again were all negative for m-v. In 2007, the majority of Canadian laboratories have switched to the AGID test as the ELISA compound using wasn't dependable. Our test adults came back negative. In 2012 University of Guelph is doing a new ELISA test, similar to the one in UK, and we tested aged ewes were negative. 2013 test were all negative.
Our flock has been scanning all our lambs every year for loin eye depth and fat depth since 2004.
We are also a founding member of the Ontario Suffolk Sire Reference Association (OSSRA). Three of our rams have now been selected as Reference Sires for OSSRA. The last was "Sir Segremore", KXK 81J, the fourth reference ram.
Bill is also a director of the OPP Concerned Sheep Breeders Society.
In 2001 Codan Suffolks successfully completed the Livestock Medicines Education Program.