Does the horse feed contain high quality protein

If you are wanting to know WHY having a quality protein in your horses diet is so important. Dr Nerida Richard explains:

0:10 what protein is and what does it mean to have a high and low quality protein in your horse's diet.

4:34 through a visual example how essential and non-essential amino acids are used by the horse to build muscle protein.

11:57 what the difference is between a high and low quality protein when looking at the most limiting essential amino acids Lysine and Methionine.