I have 9 5 week old pups who have gone off their Beta puppy,i have tried adding gravy and tinned food but nothing seem's to be working.Any ideas of what could try as i dont want the pups losing weight.They are still very normal and active.Thanks

I add to my 5 week old pups complete puppy food:
Grated cheese, cottage cheese, raw lean mince, chicken, boiled mashed eggs, scrambled egg.

you could also try some puppy formula milk poured on top of the Beta.
I think it is just where pups get bored of the same food, as do my adult dogs, so tempting them with a little extra taste on top helps loads! :) :)