Tail carriage in horses is an important factor to be aware of.
New research by Hibbs, Jarvis & Dyson (2020) looked into the relationship between lameness and crooked tail carriage in horses.
They took 520 lame horse 170 non lame horses and found that 32.5% of the lame horses had a crooked tail carriage compared to only 5.3% in non lame horses.
Therefore, a crooked tail carriage was more common in horses with increased back tension.
Top-flight Physio always takes note of the horses tail carriage during assessment, as like stated above, that alone can give you information regarding muscle tension and lameness.