You should learn all about the Jack Russell Terrier before you make a permanent decision to purchase one. You will want to find out everything that you can about them, this includes learning about Jack Russell Terrier Ears. Their Ears are very high on their head and bend over themselves to cover themselves.
A Jack Russell Terriers Ears stand in a way that makes them appear to be always listening and hearing everything that is going on. This topped with the fact that they are always very alert gives them the appearance that they are excited.
You will want to clean your dog's Ears out regularly and make sure that they don't pick up mites or ticks. The Jack Russell is a very curious dog breed that can get into mischief, so you will want to make sure that they haven't got anything inside of their Ears which could work its way down and cause them problems. If your dog starts shaking its head, or gets a foul smell to its Ears, or shows any other signs of a possible ear infection then you should have them looked at by their veterinarian.