Field Spaniels are naturally very intelligent dogs and as such they pick things up rather quickly, but this includes the bad as well as the good. Their training has to start early, it has to be consistent and always fair in order to get a dog to focus and achieve the best results. They are incredibly sensitive to "voice" and this has to be taken into account during their training which is why they are really only a good choice for people who are familiar with the breed or this type of spaniel.