Rio is the white tortie in my avatar pic,poor little girl Cleo the grey had to be put to sleep in April this year,she was only 4.

8 years old... awww bless that is a ripe old age... watch him carefully, it's amazing how quick they go down hill, we lost our indoor rabbit bumble at 2 years old... .... 

C'mon Rio - hang on in there!

Aww such a shame.bunnies hide how they feel as a prey animal,they rarely make a sound no matter how they maybe suffering,

Poor bun   I hope he perks up, Katty.

yeah...   am crossing my fingers for him Katty...   xxx

Aww poor Rio I hope he perks up too 

Fingers crossed for you!!

Poor wee fella  I hope he pulls through Kattymieoww xx 

Wow 8 is amazing for a bunny!  Bless his cotton furry tootsies!    I wish him well.  Does he live in your house?  Or in the garden?  We used to have a bunny that lived in the conservatory in the winter and he had the whole 10 X 12 foot space to run...  Also, he used to run around the house about 3 or 4 hours a day when we were in.

In the summer - between March and October, he stayed in his hutch and his 15 X 10 foot run we made for him (where we had his hutch placed,) , although we did let him run around the garden for 5 or 6 hours a day on about half the days of the week....  He loved human company.  

Hope Rio gets his appetite back soon, Katty.

I hope Rio perks up and gets his appetite back, Katty.

C'mon Rio! You did it before.. now do it again! get better! 

Ditto as all have said . 
For Rio ....