No, dogs know what a dog is, and also what a not-dog is. They clearly make distinctions, behave differently towards different things, and so on. They are neither as dumb as some people think, nor as smart as other people think.
Cats too, by the way, despite some claims to the contrary out there. Neither dogs nor cats act with the same behaviors they use with others of their species as they do with others of other species.
No, dogs know what a dog is, and also what a not-dog is. They clearly make distinctions, behave differently towards different things, and so on. They are neither as dumb as some people think, nor as smart as other people think.
Cats too, by the way, despite some claims to the contrary out there. Neither dogs nor cats act with the same behaviors they use with others of their species as they do with others of other species.