Question: dog breeds that are hardest to train?
Answer: Basset Hounds. ... 
Bull Mastiff. ... 
Chow Chow. ... 
Poodles. ... 
German Shepherd. ... 
Labrador Retriever / Golden Retriever. ... 
Doberman Pinscher. ... 
Border collie. A Border collie is probably one of the hardest working dog breeds out there and is regarded as the most intelligent dog too.