LOL Poor fishies. My horse was a little alarned at my barn-porch jo practice, at first. I think I put a little too much intent into my (not very loud, really) kiai. He's figured out now that it doesn't have anything to do with him.
For the bag, when you order your women's dogi from Bu-Jin, get the Dogi Backpack, and a Weapons Bag. I have both (plus their dogi). Great products.
Well, you have to graduate now to doing cuts mounted. Then you can train your horse in budo too to be a good war horse.
What kind of horse? And more importantly, will he look fetching in war-horse gear?
I know how to make some really cool head plumes for the bridle! (no, I am not kidding... previous job)