Here's the list of the easiest and toughest dog breeds to train breeds

The Easiest Dogs To Train … According to a new study by the University of Helsinki 

1. 'Other breed' (Australian Cobberdog, Australian Labradoodle, Golden Labrador Retriever, Indian Pariah Dog, Peruvian Hairless Dog Large, Peruvian Hairless Dog Medium sized, Peruvian Hairless Dog Miniature, Seskar seal dog, Unknown breed, Wolfdog, Xoloitzcuintle Intermediate and Xoloitzcuintle Standard)
2. Labrador Retriever
3. Border Collie 
4. Spanish Water Dog
5. Rough Collie
6. Golden Retriever
7. Poodle
8. Shetland Sheepdog
9. Nova Scotia Duck Tolling Retriever
10. Lagotto Romagnolo

Least Easiest Dogs To Train … According to a new study by the University of Helsinki 

1. Bull type terriers
2. Sled dogs
3. Parson type terriers  
4. Pinschers/Schnauzers
5. Primitive sighthounds
6. Scenthounds
7. Fighting dogs
8. Northern companion spitzes
9. Chinese Crested Dog
10. European sighthounds