thanks, thats just the info i wanted!  My lambs by a romney ram finished at around about those weights and timing so should be similar with the polled dorset.  He is a really nice ram lamb, very well put together.   Healthy equipment hanging between his legs and already at 6 months looking to go- a-tupping! Most importantly he has a terrific nature and i like the look of him! Might just have to steer away from another Romney and get this wee dorset!