"Petzl" wrote

Only thing that will reduce cholesterol is medication
Diet has no effect as it is a hereditary thing

Petzl, you are so wrong. Heredity has an impact for sure, which is why some
who eat anything and everything always test normal, but for those who do
not, diet can often control it. Medication may not be needed.

I popped at over 400's regular (not just one test) and adapted diet. I now
hit 120's on the regular with a very high 'HDL' and more than acceptable
LDL. This has been an ongoing diet change from age 25 to age 45.

People lie to themselves on this one because they do not want to change.

Now to the OP with the cat with higher than normal CHOL, I think the vet has
the right of it that getting the cat to eat at all is needed, but to try to
gently trim the weight back. Baby food jars are 3-4oz and a dibble of them
mixed with a fork into a lower calorie dry she/he likes, might work. She
will resist change just like any human so start this small with a few
crunchy bits added to her/his normal breakfast of baby food, then expand
out.