The more energy your equine has, the more it will gain from fodder and drinking. Stroke gives more energy the less your equine has. Take this into consideration if you have a sequence of events that restores energy. Example: instead of feed - drink - stroke, select stroke - drink - feed. Your equine will get more energy that way. 
Stolen from lil420kitty's page... :D
Helpful actions:
- If you go to Archimedes and answer the question at the top of the page correctly you can win 1 aging point. Limit once per day
- If you go to Frost and defrost her you have a chance at winning a Hypnos’s blanket, which is a BM item that allows you to care for your horse without boarding it in an EC. Also, on the first of each month, a Frost will be offered to one of the players that helped defrost her. Limit once per day.
- If you go to Xanthos and stroke him, you can win energy for one of your horses and you may even win a horn of plenty and 1000 equus.
- If you go to Topaz and congratulate him, you get 50 equus and you have a chance of winning a diamond.
- If you name one of you horses "Junior Croesus" (gender doesn't matter), it has the chance of becoming a Croesus every month. In case you don't know what a Croesus is...it's a divine horse that produces equus instead of manure. It also gives the owner a pass on the 13th of every month as long as the owner logged in the day before. If that Friday is a 13th, the owner gets 2 passes. So it's worth doing, but just a side note: only one horse counts so don't bother naming all your horses Junior Croesus.
- If you go to the player Hades page, you can find direct access links to companion animals and few other helpful things.