Sick Cat?

My 8 years old cat, Lucky is acting differently earlier this week as sleeping more and has no movitation to eat well or drink good, but I see that he is not dehydrated when he finally ate his dinner & drank water yesterday. Also went in litterbox okay and don't know if his age affect him to slow down. My other cat, Princess is so worried and watches him constantly. I might have to take him to the vet later this week if no improvements and see if you have experience like this signs.

Hi Blondie!
If you feel like something is wrong, there probably is. I would take him to the vet, especially if he continues being lethargic or if new symptoms occur. Good luck!