I use the vet for POM stuff (like anti-biotics, oxytocin and parvo vaccs) and I use either Holmfield Farm Services in York or VetMeds Direct in (think it's) Livingston for other stuff - gleptosil, ery vaccs, wormer etc.
Holmfield Farm Services have pig vets on hand, so they may be able to issue a prescription if needed ?
I found that with the phone/on-line companies one will do one thing cheaper and the other will do something else cheaper - so it's swings & roundabouts really
I'm finding buying a syringe of just what I need from the vet is working out far cheaper than buying a full bottle (with only 12 'breeders' we never use it all in time !) but have to admit I've never gotten them to price the wormers etc - something for the 'to do' list me thinks.
HTH Lee
Karen