My 3 year kitty is usually sleeping during the day and upbeat an
playful @ night.  Loves going out into the garden to hang out w/ou
neighbor's cat. Very vocal and loves to talk.

For the past couple of days, he's been sleeping and being lazy all da
and night.  Doesn't get excited about playing with his favorite toys
Seems very low energy. just wants to sleep...almost "depressed like".

Appetite is good.  Litterbox is being used....

Should I be worried that something is wrong...or is it common for cat
to get the "winter blues"?

--
suzuki