Many wondered about this. Why do puppies have blue eyes if the mother and father had a gold and brown eyes, respectively?  Well, I will give a couple of quite clear and simple reasons that are lacking in real life. It's just ... the reason.
Okay, because of the negligence of animators and artists there was confusion between the puppies. Some we remember. But in almost every frame has a lot of mistakes: all puppies blue-eyed,  all puppies with brown-eyed. Because difficult to disassemble them. Why so?
 
But we know that there are three puppies with blue eyes and three puppy with brown eyes.

In fact, this confusion is not the only puppies. Balto in a dream becomes a blue-eyed!
 
Okay, this is also a blooper, but I won't  speak about it. It's just the intro. We now turn to the main.

1.  We see that many puppies have blue eyes, but their parents have brown or golden eyes.
 
In general, not surprising.

Puppies have a breed of siberian huskies, and they have in the breed standard a blue eyes. And this is regardless of the fact that his closest grandparents, mom and dad are a brown-eyed.
 
Two puppies with brown eyes, two puppies with blue eyes. This is inherent in the breed standard at the genetic level (can also be different eyes, one blue and one brown; but once personally I had the siberian husky, who had eyes the color of turquoise or aqua, with a silver suit).

2. However, there is one statement. This puppy (with a red stripe on the nose) was first blue-eyed, and then he began brown-eyed. Okay, I don't want speak about bloopers. But a reflection of real life here can result. And it is justified.
 
Yes, he changes the color of his eyes.

So, I think that know it all. Puppies, kittens, cubs of various mammals and babies (human's children) are born with blue eyes. Then their eyes get own real color (several months must pass).

It does not depend on the species, or anything else. They all are born blue-eyed. Their pigment still weak, sometimes the eyes may have a grayish hue. But then they grow up and their eyes turn brown.
 
In the example I gave only puppies (we're talking about them).
So those puppies that were with blue eyes, just the youngest in brood, and they (if it want to become an adult) can be represented with a golden or brown eyes. This is justified.


3.  However, that Aleu? She is still remains with blue eyes. She is not a wolf, but almost dog.  While walking along the wolf's image.
 
Blue eyes are pretty cool. As sapphires.

I have already said that the young cubs of mammals are born with blue eyes. Wolf cubs are born blue-eyed (adult wolf's eyes may be yellow, copper, gold, greenish color).

Yep, But What's Aleu?


Oddly enough, but the wolf-dog crossbreed always has only the color of eyes, which wolves have. Accordingly, blue eyes only mistake animation team who worked on the film, well, to emphasize the "personality" Aleu. Well, I think so, at last.

Although the white wolves (arctic) blue eyes are very suitable in appearance. Quite nicely.

 
P.S. Old White Wolf design was: pink nose, blue eyes, black border wasn't on ears , lilac-gray spots wasn't on eyes .

Most likely only just statement number 2. I think.

Thanks for reading!