Please Help~older cat is too skinny :(?

you need to put ur fingers along the spine... if they are close together, take it to the vet immediately. if you pull up thee skin on the back of the neck area and it doesnt snap bag like a rubber band, VET Now. i had to take my best friend to the clinic with her cat and it was 16, turns out we had to put it down because it had souveir kidney failure. take it to the vet as soon as you possibly can.