Here is the full list of all 12 Dog Sled Saga achievements.
Qualify for and join League 2
Qualify for and join League 3
Qualify for and join League 4
Qualify for and join League 5
Qualify for and join League 6
Qualify for and join League 7
Hire your first new dog
Take a dog off your team
Expand your kennel
Win a race against your rival
Have your rival offer to be an employee
Breed your first puppy