I've seen this question asked before, but i feel the answer didn't quite answer all my questions, so here goes.
Now, I am rather sure that this:
The cake was eaten. (by someone)
Now, recently I've noticed a few cases where the passive form was used with "を" instead of "が".
Judging from the examples I've seen, I would guess that:
Means something along the lines of
my cake was eaten (by someone)
However, can this be used with someone elses cake instead of my own? I guess what I'm basically asking is whether this is possible:
And if it is, does it mean:
The dog's cake was eaten by the cat
Or can the Aを(passive verb) construction only be used when I'm speaking of something directly relating to myself, the speaker?