These trained canines were raised from when they were pups to be killing machines, and performed extremely well against enemy troops, despite often taking heavy casualties under fire. They were very useful for reconnaissance purposes due to their speed, vision, and expendable status. They could also sniff out enemy spies no matter what disguise they had taken on. They were of particular use during the Psychic Dominator Disaster, as Yuri's psychics were only trained in controlling human minds, and were vulnerable to dogs.
Being dogs armed with only their own teeth, they were unable to attack anything other than infantry. Groups of enemy troops were able to kill dogs before they got near, and Tanya, Navy SEALs and Boris could kill dogs instantly. Furthermore, the brute's skin was too thick for a dog's teeth to pierce. Tesla troopers, however, had weak points in their armour which dogs exploited to lethal effect.
The manual for The First Decade states that Yuri's Army has access to attack dogs. This is not quite true, as the Prerequisite lists for the Yuri dogs have the Allied/Soviet Barracks in them, so Yuri players have to rely on brutes instead unless they can find and capture an Allied or Soviet Barracks.
Because of how Westwood made faction-exclusive dogs (RequiredHouses logic), Yuri is the only faction that can train clones or copies of both Allied and Soviet attack dogs if an Allied or Soviet barracks are captured, respectively. Allies and Soviets can only train their corresponding type of attack dog, even if the opposite barracks is captured.
Again, Yuri can only train the clones/copiesYADOG and YDOG, not the original Allied dog with ID ADOG nor the Soviet dog with ID DOG.
The result of this is dogs not always being selected properly when using 'T' if there are different Types (which shouldn't happen in regular gameplay). This not something modders can fix without using Ares DLL for the new GroupAs= flag.
A technique to fix it for the base game without engine extensions is called "Infantry Linking". It is recommended no modder does this. Ever.
In real life, the Siberian Husky is a poor breed choice for attack or guard dog: these dogs lack the territorial protection instinct, and are unaggressive towards humans, therefore they cannot be trained to perform direct combat duties.
An early concept included an soviet tank hunting dog which was cut from the game.