Where is Toto?

The Hubbster let Toto (our 15 year old Beagle) off the lead late yesterday afternoon, and she didn't come home last night. The few times she has wandered away, she has spent the night chasing rabbits and kangaroos and ventured back around midnight, exhausted but happy.

We woke this morning and she is not here. I'm worried. She is 15 years old and not too well. I worry about snakes biting her, or dingos attacking. We are going to drive around the property and look for her, but we didn't even hear her yelping last night, as she did when she was running around. It's very strange. I have a bad feeling about this.