I am sorry to hear Cassie is having some problems.
Has she been interested in eating any lately?

I do not mean to scare you, but I know you are looking for honest opinions. I just wanted to throw in that the week prior to my Frisk making that final trip to the RB he was wobby and would often fall after taking a few steps. I had noticed his paws were colder than normal but did not pay much thought to it back then. I did not know if it was because of his sudden onset of diabetes or something else...

((((Hugs))) and prayers going out to Cassie and all of her humans. You will all be in my thoughts.