we let Jethro upstairs, to be honest he keeps me company during day when im home alone (im mad & talk to the dog all day). Hes only allowed up with supervision & he tends to listen to that. We have 2 cats that happily put him in his place when he's in there space. (had to laugh other day that Tom the cat had jethro sat at side of him & didnt hiss till he noticed i was there, Proves hes putting the hard done to cat on
).
We have a stair gate on the living room door, i move it around as needed. However the little rascal has found he can jump it (worrys me sick with his joints, but how can you stop them all the time).