Other people have had different experiences. From an Amazon review:
Weruva just about killed our cat
By catfan141 - April 7, 2013
This is an alert for anyone currently feeding a diet of Weruva to their cats. The short story: Weruva products gave our totally healthy, 8 year old cat kidney...
K3 does go by a lot of names:
Vitamin K supplement
Dimethylprimidinol sulfite
Dimethylprimidinol sulfate
Dimethylprimidinol bisulfate
Menadione sodium bisulfite
Menadione sodium bisulfate
Menadione nicotinamide bisulfite
Menadione dimethylprimidinol sulfite
Menadione dimethylprimidinol sulfate...