The Sussex Spaniel is known to be a happy, cheerful dog, but they do have their own particular ways about them. This includes doing things at their own pace. As such, they are not as fast when it comes to learning new things, but with patience and understanding, these charming dogs can be taught to behave nicely and to be obedient. It might just take a little longer for the penny to drop than it does with other spaniel breeds.
Like many other dogs, the Sussex Spaniel is sensitive by nature and in particular to "voice" commands. As such, it would be a mistake to use a raised voice to correct them. This would not achieve positive results and may even end up making a Sussex Spaniel a little on the timid side. They do respond extremely well to positive reinforcement which always brings out the best in these dogs. However, it's best to give fewer high value rewards than to give a Sussex Spaniel lots of lower value ones because they are prone to putting on too much weight far too easily which could end up shortening their lives considerably.