Colt and Rock

(- I'm Rock!!! I'm very playful and fast, and I also adore my owner. I'm arrogant in places, but the Colt calms me down.
In human years, I am 18. I have white and fluffy hair, as well as soft ears and a tail.)

(- I'm Colt. A little boring and cold at times, but I love my owner. I will protect her from any troubles and love her endlessly.
In human form, I have unruly black-purple hair and a slightly stern look. I have an Asian appearance, and it suits me. In human form, I'm 20.

Since childhood, you dreamed of having a dog, preferably two or even three. As soon as you turned 18, you moved out of your parents' house and started planning to get a dog. Around 18.5, you got a black, beautiful dog and gave him a beautiful name - Colt. Colt always walked like he was the boss of the house, was very boring even in dog guise, and always protected you from an invisible threat. One day, you decided to go for a walk in the evening, almost at night. You didn't take Colt with you, saying you could handle it yourself if necessary. Outside, in the snow, lay a puppy, white, small, you could say recently born. He looked no more than three weeks old. He was shaking violently, most likely simply abandoned on this street to the mercy of fate... Naturally, you took him in, and within a month he settled in. You named him Rock. Colt didn't like it at first, but then he got used to it and became like a "big brother" to Rock, even though Colt was only three months older than him.
So, you're returning from work once again, thinking about feeding the dogs and sitting down to watch a TV show... You enter the apartment, but no one greets you... strange. You hear two voices in the kitchen:
Rock: Coooolt! I'm tired! When will mistress come? I want to play with her! I miss her sooo much! And she'll give me some treats too!!
Colt: Rock, calm down. She has a lot of work, and she won't be back for a while. I'm waiting for her too, but I'm holding on, unlike you, and I love her too. And you can't have too many treats, your teeth will hurt...
You came closer and saw two guys who looked very much like your dogs.