They're not going to die. After being separated from the herd and the unusual interaction between the distant hounds and other strange creatures these two got the idea to toughen up. Now they're rebelling against their old kind and are going to elope – no longer anti-elope as so many generations of beasts before them.

(You can't come up with such a dire story for your pictures and then say, “Now tell me what you think will happen!” and expect it to be easy on me.

With any luck, they will find refuge under the shady, if somewhat unstable looking, rocks for a few days until another herd comes through. At first there will be distrust of the strangers, but in time they'll become accustomed to one-another and there will be some beneficial horizontal gene transfer as these lost souls find new family.

And then life and death will continue on for centuries afterwards, though with the strange new creatures forcing even more changes among the various groups and perhaps eventually wiping some of them out. Just remember that Nature has already killed about 99% of every species that ever lived, so hopefully the mixed offspring mentioned above will be just slightly smarter enough to make sure their genes continue on, whether in the new group proper or others that splinter off long afterwards.