We found this girl abandoned at an uninhabited house across the road. Any idea what mix she is?

For those wondering: we live in a pretty rural area, house across the road from us is currently uninhabited and there has never been a dog there. Heard barking all morning and found her tied to a property stake with no food or water. Assuming someone ditched her there overnight. Called the local animal shelter and a sherriff’s deputy called back and said they won’t have room for her until Tuesday or Wednesday. Any advice is much appreciated!