[Bramblecot]

Re heptavac.  The smallest quantity is 50 ml which gives doses for 25 sheep, and you give them 2 jabs approx 4-6 weeks apart.  It must be stored in a fridge. 
Again, your vet may supply you just enough for your sheep but, at this time of the year, that is probably unlikely. (Lambs get their jabs as their immunity from mum runs out).  It is worth asking though
  .

Good luck with your Shetlands you will - great little sheep . (Not that I'm at all biased of course )

[Melmarsh]

I confirm your other advise, except, if you haven't had sheep on the land before, I would house ,worm egg count, done through your vet or give a zolvix drench which your vet would recommend if there is any possibility they may have resistance. Vet for advise in your area every time. Usually helpful with small quantities and type of wormer required.