[graemep]

Not at all like slavery and I very much doubt that anyone will ever think so.

Slaves can state they want to be free, and often rebelled and resisted. Spartacus, the Zanj rebellion, the Haitian Revolution, and many more.

It requires constant indoctrination and denial of access to ideas and brutal suppression to even try to keep the resistance down even to those levels. No one censors what dogs can read (unlike, say, The Slaves Bible).

Dogs are demonstrably significantly intellectually inferior to human beings. other humans beings are not.

I do think it is lucky for them that other human species have not survived as they are demonstrably biologically different (at least not counting those we can interbreed with), probably unable to resist anything like as effectively, and would be far better slaves than humans and better experimental subjects than animals.