Did large dogs ever exist?

Factual Questions
61

[QUOTE=John Mace]
As was noted earlier, domestic animals don’t count in this discussion as they don’t occur in nature. Same deal with the liger.
[/QUOTE]

Nope, sorry John, if we can talk about great danes then wolfhounds are fair game.

62

[QUOTE=bluesmurf]
Nope, sorry John, if we can talk about great danes then wolfhounds are fair game.
[/QUOTE]

It’s clear that the OP is asking about species that exist in nature-- neither of which great danes or wolfhounds do. And of course neither of those breeds is a species either.