Gandalf sat at the head of the party with the thirteen dwarves all round: and Bilbo sat on a stool at the fireside, nibbling at a biscuit (his appetite was quite taken away), and trying to look as if this was all perfectly ordinary and not in the least an adventure. The dwarves ate and ate, and talked and talked, and time got on.
My brother is telling me I can't have dwarves in my book breed large dogs (similar to breeds like the Tibetan Mastiff or Irish Wolfhound) to ride into battle because it's "scientifically inaccurate." He says that it wouldn't work because animals big enough and aggressive enough for that can't be domesticated for breeding. They can only be tamed. Does this mean I should come up with something else? Or could I get away with it if I was consistent with it? And aware of why it wouldn't work irl?