That sucks so bad...I almost lost both of my puppies at separate times. They seem to like to wander until they've wandered too far. Both times I cried because I couldn't imagine how scared they could've been. I keep a tight reign on both now and warn new people about the door when they come in.
I hope you find Zeke, so you can rest at ease....among other things
I also hope that whoever took him gets theirs.