Coco's Thyroid level is a little low

I got a copy of Coco's Thyroid test and her Thyroid is low.

Does Coco have known kidney issues? Renal failure can often suppress thyroid values. Primary hypothyroidism (low thyroid levels as a result of thyroid disease rather than some other secondary cause) is very rare in cats but can happen due to other illnesses in the body.

They think she has Crf.

I know when Tigers thyroid was low the vet said it was due to some illness suppressing it - she had some odd leg and stomach issues at the time. Fingers crossed for Coco

Thanks,
I hope her blood tests are better next time.
She goes on Oct 21.