DEC 7th is a little late for the ram early or mid nov would be a little better
Depends where in West Yorks phb is. Up on the hills, lambing in May is easier all round

Sheep love to make fools of us.
I took Rosie Mule down to my Shetland tup lamb, Chad, on 22nd Nov. He was very keen but she was a little large for him; I expected them to find some uneven ground and manage, but she came a-tupping again on 10th Dec, so I led them down to a very uneven area and left them to it.
She didn't come again after Christmas, so I fully expected her to be last, on 6th May.
I didn't have a start date; Chad had been with them since he arrived in mid-August, and I don't use raddle on my fleece sheep. I had dates for some of the girls, but not all.
Before anyone had lambed, Anya, the Shetland that came with Chad seemed restless, big in the bag, on the morning of 15th March. Of course she did, I had planned a trip out with a friend... never mind, I went out, but came back early to check her.
Final tally? Rosie lambed on April 16th, so had been served that first time and had had no business coming back to the tup on Dec 10th.

And Anya? The last to lamb of them all...
