Full Idea
It seems quite plausible to me that many animals have experiences without knowing about them.
Gist of Idea
It seems plausible that many animals have experiences without knowing about them
Source
John Perry (Knowledge, Possibility and Consciousness [2001], §3.1)
Book Reference
Perry,John: 'Knowledge, Possibility and Consciousness' [MIT 2001], p.48
A Reaction
I agree, which makes us acknowledge levels of consciousness, which probably applies to human experience as well. The simplest idea is to distinguish between experiences which involve concepts, and those which don't. Animals sometimes appear surprised.