I tried to visit that site but there is a banner on it claiming to be closing down. If you can still get on it and save to your computer the sheep calendar, let me know..... otherwise, it looks like it is lost forever.
ps. Happy Thanksgiving
A good dog may be hard to find, ...but a hard dog usually means it's been dead for a while
Some breed naturally out of season better than others. The British breeds are generally seasonal. Cool weather has nothing to do with it, losing light affects them more. You can bring (pretty much) any sheep into heat artificially. Lots of management systems use this to lamb three times in two years.
Do not meddle in the affairs of Dragons, for you are crunchy and good with ketchup........