What does everyone think of this food ..i have a Bullmastiff 19 wk pup on Wainwrights large breed puppy and she's on the skinny side and doesnt really like it

I tried this food on my pups before and, like yours, they didn't really like it.  I prefer to use a food that's well balanced and that the dog actually wants to eat.  We have settled on Royal Canin now.  Bit more expensive but none is wasted.

Mine all eat it and look well on it, just bought a bag to try with my pup.

Duck is their favourite.

I have fed WW Salmon and potato dry to all mine for 4yrs with no problems at all.
They all do well with no upsets and have a lovely shine to their coats.
In fact I have started our pup on WW a few weeks ago as she was very scurfy on arrival and now she is all clear after 4weeks of feeding the WW.

Just to add I only feed salmon and potato flavour and not the other flavours.