The cades weren't mine so have no idea whether they had iodine or not.
Amanda, thanks for that info. I'm staggered by the different things sheep (and lambs) can get! I've decided to take them off the ewe now, she didn't let them feed even tied up today, think she has had enough. So I will be bottle feeding them. I did call the vet and he thought it was probably joint-ill, so I have a 5-day course of ABs and an anti-inflammatory injection. I agree with you about the shivering, she is probably hungry, although she's a good weight and doesn't look thin.