I'm pretty sure Equestria will not approve of that tbh.
Equestria is not really that strong right now. They have the two alicorn princesses, and that's it. Discord probably hit them harder than most too.
They already lost the pillars of harmony (should actually have happened BEFORE discord, if i remember the timeline right), and the elements of harmony probably wouldn't work against magicless not-possessed gryphons.
...Actually, i hope we find the crystal empire next time we explore. Right now Sombra should not exist yet, and Princess Amore (or whoever rules there in this quest's headcanon) would be a good trading partner and (possibly) ally.
we find out they're hostile dicks then we prepare our army,
let's be honest, we'll prepare our army anyway "just in case". We don't have the magical deus ex machina/macguffin after all.
And it comes in handy against all the monsters of our land anyway.
This was actually touched on in an earlier post when the Dogs were first integrated. As far as you know, none of the Dogs in your Empire have any sort of magic. The Dogs tell stories of Alphas that could see through walls, conjure flames, and do all other kinds of supernatural feats, but as far as you can tell that's all they are: stories.
right, i forgot
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Now the question is: Were they the alpha because they had magic (and were, thus, stronger), or did they have magic BECAUSE they were alpha?
I find the idea of dogs gaining magical powers from their position of leadership (or, to be more precise, by being recognised as such by the other members of their packs) an interesting possibility.
Or, sadly more likely, those are simply stories and there is no such thing as a magic dog in this world...
We'll see what happens in a few generations i suppose.