diff --git a/HELP b/HELP
index c5cf48c..d9a689e 100755
--- a/HELP
+++ b/HELP
@@ -7,7 +7,7 @@
 
 AIM
 
-The aim of the game is to breed a cow that is `excellent` for your chosen
+The aim of the game is to breed a cow that is "excellent" for your chosen
 use. At the start of the game, you are asked to select this goal from
 the options "dairy", "meat", or "plowing". You will be notified once you
 have achieved your goal, and told how many generations you took to do so.
@@ -21,13 +21,21 @@
 Each cow also has a unique ID number and a record of its generation
 and who its parents were.
 
+Cows are rated for a given use with the formula:
+
+	rating = (traitvalue * 2) - (aggression^2)
+
+So if a dairy cow has a milk trait value of 12 and an aggression of 3,
+her rating will be 15. (A rating of 20 or above is considered "excellent".)
+
 
 THE HERD
 
 The herd is the accumulation of all the cows you own. Initially, it
-will consist only of four cows that are not very good at anything;
-as if you had just tamed four wild buffaloes. As you breed your cows,
-your herd will continue to grow.
+will consist only of four cows that are randomly initialised and probably
+not very good at anything; as if you had just tamed four wild buffaloes.
+But as you breed your cows, your herd will continue to grow and hopefully
+start to contain some better animals (if you're a clever breeder...).
 
 
 BREEDING
@@ -55,5 +63,5 @@
 this animal from your herd.
 
 If you wish to save your game progress, you may do so via the
-`File` menu. Restoring a previously saved game may be done from the
-same menu.
+`File` menu. Restoring a previously saved game or resetting to a new
+game may be done from the same menu.