New Beagle owner Hi Everyone

HI I am bengunn and I recently rescued a 3yr old beagle. Her name is Joy, but might soon be Molly. We haven't decided yet. I have never had a beagle before, my last 2 dogs were heelers. A Queensland blue, best dog I have had so far and a red mix. I really think my new beagle will rival that. Just wanted to say HI and ask if putting an electric wire back up for Joy would be a good idea so soon. I have had Joy/Molly for only 4 days, but she seems determined to find a way under the fence. I thought I would not get another dog, so I got rid of my fence charger, but then I saw this adult beagle at the shelter.