['My cat was just diagnosed with hyperthyroid.', 'That is horrible.  What is the treatment for it?', "They gave us meds but they're not working.  He still seems happy but he's constantly losing weight."]
I wish your cat the best.  I know it must be hard
My cat was recently diagnosed with hyperthyroidism.  The meds don't seem to be making a difference, but he still seems happy.