You know that seal that you get when you killed bandit that coming while carrying trade item ? yeah thats very seal that can be exchanged with magic butcher / pickaxe. You also can exchange those with Black Essence for your Harphia / black spirit crystal. Yeah I know how hard it is watching your horse walk (because it cant run) with those big bag on it.
 

What if I tell you that you can farm those seal casually (while travelling into world boss) or even actively (run across bandits location) without penalty in your horse speed ?
 

What you need:
1. Around 5704 Silver
2. T5 Horse minimum (not tested it with tier below 5)
3. Drift + Instant Accel / Sprint not mandatory, but very helpful when you're actively collecting those seal
 

What to do:
1. Go to Glish Trade Manager NPC
2. Buy 1 "Freharau's Dry Mud"
3. Pack it on your horse
 

Thats it, now your horse carrying trade item without those big bag. you can still use skill like Drift + IA / Sprint to travel faster.
 

Pros:
1. Can use skill like Drift + IA / Sprint
2. Happy horse (Animal abuse no more)
 

Cons:
1. RIP 1 horse inventory slot
2. Slightly uncool your horse with that mini pack on the back (unless thats your style)
 

[Will update with picture later]