Polypays:
http://www.ansi.okstate.edu/breeds/sheep/polypay/index.htm
http://www.countrylovin.com/polypay/index.html
 

East Friesian:
http://www.ansi.okstate.edu/breeds/sheep/friesianmilk/index.htm
http://www.asas.org/JAS/symposia/proceedings/0908.pdf
http://www.asas.org/jas/jas0913.pdf
 

Romanov:
http://www.ansi.okstate.edu/breeds/sheep/romanov/
http://www.sheep101.info/breeds.html
 

Rideau
http://www.rideausheep.org/sheets.php

Charollais
http://www.charollaissheep.com/
http://www.canadiancharollaissheep.com/intro.html
http://www.charollais.com.au/why.html

British Suffolk
http://www.suffolksires.com/members