@Salv
 
You say it’s Disney? Two of them remind me of Balto. It’s Jenna and Sylvie, but then as Diamond Dogs, so it obviously must be Universal Pictures!

One of the PBF forums depicts Diamond Dogs as something like early Soviet Union - People’s Republic of Canida!

There is a very good sci-fi alternative reality fanfic about diamond dogs and ponies: The Days of Wasp and Spider I highly recommend it :3

On my part, I view the common diamond dogs to be militaristic, assertive and hierarchical in nature, but at the same time ignorant and a bit naive. If you ask a common diamond dog why they are creating weapons/why he is guarding this post/why he is fighting the enemy/why he kidnaps ponies/why he mine gems, the most common answers would be because it is work or it is because it is what I do. They are pretty good at catching, understanding and putting into practice instructions and orders given to them but they have little grasp or care little to what the instructions or orders are meant to do or be. One can see that behavior and way of thinking in the comics and a bit in the show too where the diamond dogs are able to create armors and weapons, mine gems(I mean mining does need some good engineering to plot out those tunnels and prevent a cave in), are able to create castles and are pretty knowledgeable when it comes to basic law and order, however they also don’t know why those laws are created, where their mined gems are traded too or what is even a regime. One could say that they are both mature yet also child-like in mentality.  
However like in real life, dogs are bred differently and not all dogs are the same. Their leaders, diplomats, generals, advisors and dogs of importance are different and are more capable of planning and sorting out problems and dilemna’s that their race/pack face. They are not easily fooled or led around by other dogs and by other race’s as well as evidenced by Rover, a brute of a leader able to assert his authority on Rarity(for some time) while Jim(diplomat dog on the comic) is able to fool Trixie into wearing the crown of subjugation and installing her as their queen so she can use her magic to find them more gems. Another intelligent dog and a favorite is the OC diplomat DD from diamond dog embassy, you should check it out. Its cute and stuff.
 
Overall they are a quirky yet powerful race as I imagine, with clashing characteristics, weird priorities yet self-assured of themselves and their kind in the overall scheme of things.
 
PS: Hasbro and the animators are really wasting the potentials of DD’s. I hope they show more of their kind in the future episodes or seasons.

@Salv  
(if pixar doesn´t get invited that might actually turn out watchable.)

Disney Pictures & Hasbro present:  
The Diamond Dogs  
Coming soon: Summer 2016