Jake's preference to be on his own is quite the same as Rex' (German Shepherd, 3y), who is very quite inside our home, and would rather stay in his "solitude".

I noticed that just before becoming sick he does not leave my side and acts very playful and demanding of attention, like you described Jake's acting.

Also for the duration of the time he is in pain or ill he will not be anywhere, but by my side.

Rosana
and
Rex