Sluggish Horses

Sluggish Horses is a module which imposes weight values on horses, llamas and pigs and makes them slower.

Overview
Horses inherit the weight values of their riders from Encumbering Inventories. If the weight value of the rider is negative, it does not subtract the horses' weight (i.e. wearing a lot of speed rings will not make the horse attain negative weight, but will not add any weight on the horse).

Every item in a mule, donkey or llama will add a weight of 1 onto the entity.

Bardings
Horse armour (or bardings) add significant weight values to the horses.

It is sometimes better to not equip horses with armour, instead, have the armour pieces be upgraded first before equipping (as with Better Bardings).

Weight Penalties
The penalties for weights for horses, llamas, donkeys and mules are as follows:

Like the Encumbering Inventories module, negative weight values will make the horse faster, albeit this is only achievable with the Better Bardings module installed.

Trivia
This module can be combined with the Equines module to make your horse even faster. However, both modules work and are asserted independently of each other.