Hi,
I don't tip any of my girls (I've only got eight) they are all trained to tie up - start when they are 'medium' sized not babies. I have a small webbing pony/foal halter the sort that has adjustable nose and head straps. I put a few more holes in both straps to get it small enough, also to start with I run the head strap down the nose and through the nose buckle as well, this way they can't back out of the halter, also attach the rope clip to the top/front of the nose buckle (like a horse lunging canvasson) this then keeps their heads up. They soon get used to it. I do it on a regular basis even when they don't need anything done - pick their feet up like you would a horse, tap the hoof, fiddle about give them a titbit, make a fuss of them then let them go. They can until they get used to it 'kick out' a bit but soon get the hang of it, you just have to be firm, but gently while you are hanging onto the back leg of a leaping sheep. Once they realize you are not going to give in they soon settle.
Now it's easy to put the halter on as they know they'll get a titbit.
I tie them up with their heads into a corner so I can 'knee' them to either side, they even get used to that and move over with very little pressure.
LIME: I use lime and foot/scald problems have been a lot less than before, their feet are alot harder than before. I put it were the sheep are either going to walk through it - like the barn doorway or where they are going to stand to get at the lick/water bucket - I have these in the barn and the girls come in to drink/lick etc. It's best if you can put it where it's not going to get washed away by rain. Be careful not to use it when it's windy - I use a bucket with a childs sand-spade to sprinkle it a couple mm thick about a square meter in size. You do need to replenish it/do it on a regular basis not wait until their feet are bad.