Animonda Renal cat food (Bryn Gates WN2)

Bought this for my cat and she won't entertain it. It is Animonda Integra Protect Renal (German brand) dry cat food for cats with kidney disease. There is over 800g left of 1200g (I tried a few times to mix it in with other food!). Seems a shame to waste it, especially as it might help a poorly kitty. WN2 area, Bamfurlong.