Hi Kerry welcome to the wonderful world of Weimaraners :D
I would try Burns
http://www.burns-pet-nutrition.co.uk/ if you are looking for an excellent complete dry food (meat, rice and veggies) or Naturediet for a complete wet food (also containing the same ingredients). If you do a search on either of these you will find many satisfied customers on this site. I see you are feeding JWB at the moment which some people have a lot of success with, although as it is "complete" I would not add anything to it.
I would not feed pedigree myself. Whether you soak your dry food or not is a matter of personal choice.
I would continue 3 meals a day until around 6 months or when my dog demonstrated he was not hungry; although this is rare in a Weimaraner! :D
Hope that helps :D