I'll give these as a treat not a meal in future.
I have 5 cats, 4 out of the 5 had a bad vomiting issue after eating these biscuits. 2 were lethargic. The vomiting was after the cats had eaten a lot of these rather than their usual wet food and biscuits mix. I'm pretty sure they over did it with the biscuits. I was on the verge of taking to vets for the vomiting. To see what the cause was next feed I gave them one thing at a time, starting with the wet food and then a small amount of other biscuits. All is well but can't give them these again.