Sorry to hear about ur loss. Thats the problem with pets, they become so attatched to you, your heart breaks when they leave u. Dogs are not like plants or fish, because they are so interactive and play with you, you feel very attatched. Do give your jack russel some toys to play with, somethings for them to chew. My dog chews MY stuffed toy my friend bought for me -.- (left it on the floor one day and saw the stuffing came out the next day), and a tennis ball. Occasioally i will throw the ball and let him chase lol. Must channel all the energy somewhere. I love my JRT. certainly very cute and a bundle of joy!