A nice walk in the wood and a lot of carrots! :D
Food and strokes are the best gift for horses
To me the perfect gift is a new saddle pad and treats!
It's so sweet to celebrate her birthday! :) Food is a safe bet: fruits with honey on top, homemade treats, smoothie for horses (they love it). Or you can even make a real cake with bran, barley flour oats and a fruit or vegetable. You can also massage her (the back especially, the limbs, the neck), go for a walk with her or give her a toy :)