I can't even express how happy and excited I am right now! It seems that I might have found Snicker's mother, complete with pictures and a possibility to even visit her! All that after her being unregistered, with unknown owners and completely untraceable! :)
Yayyy, it's her, it's her, it's her! I found Snickers' mom! She's been working in an equine therapy centre since year 2007. Now! I even got a picture of her with another foal - she's a beauty, dark chesnut with a blaze and a white sock on one of her hind legs.