I just bought a jack Russell Terrier from a pet shop but they told me it was a Fox Terrier and the lady in the shop also told me it was the dog of The Mask, the movie and if I'm not wrong Milo from the mask is a Jack Russell Terrier.
She is very cute! her name is Leika and she is very peaceful nad quiet even though at she wakes up really early and starts crying and nearly wakes up the whole house!! Then i take her outside to do her necesities because she sleeps in the kitchen 'cause where I live the nights are really cold and she starts shivering. She loves to play with her chew toys and her rubber ball. I she doesn't get agressive but she's got a thing with my fingers that whenever I move them she starts licking them and biting them!
The only problem is that when she's alone she cries no matter what time it is, and she doesn't eat much. Leika is 2 and a half months old and i am very prud of her intelligence, she's already potty trained!!! Even though I didn't even train her. Jack Russell Terriers are very clean and intelligent, you chose the right dog.