I bought a 2kg tub from the breeders club too. I was very pleased with it as it came with a bottle, 3 different sized teats, measuring spoon etc. Its actually sealed in 4, 500gm foil bags too so the rests stays fresh when you open a bag.
That is only 50p dearer than buying it through the breeders scheme.....I did notice that my own vet sells the smaller tubs cheaper than I can buy direct from RC
I also got sent an offer code for 15% off everything so try the code wb15 free deilvery over £29 and if a new customer you get £5 off when you spend £49 so plenty of options for everyone.