I don't think stallions need spotted hyena markings on their tails? o3o Just to add creativity to the design...
And claiming to be albino when you have a black pelt? waitwut. Also, are you sure the tiger and lioness are those species or a made-up subspecies/species...? Meh, those are strange if they aren't.
Hmm, let's see... I don't remember seeing anything unrealistic honestly like that, but for a fact I have seen stallions with no spotted hyena tails. I have even had a feline character that was a horse before, but I have my opinions on how to make horses sometimes.. ;-; Okay, back to the topic.
A colt that was completely red, like unrealistic red I remember seeing. Seriously? o3o I think I have seen this... and a human that was pitch-black. Never seen it, really. o3o Though I ain't judging them.