Hi, my 17 year old male cat has completely stopped eating on his own yet continues to drink. He looks 'dazed and confused' most times however recognizes me immediately, purrs when I pet him or talk to him, allows me to feed him pureed food via a medicine dropper and he is having no issues using the litter box. He sleeps 99% of the time. Might he have had a stroke? He was otherwise 'perfect & normal' up until 2 weeks ago. Thanks.