The 24th and 25th night in Endling will require you to be careful - the abilities of young foxes will come in handy. You will learn which areas to explore and where to find food, as well as how to gain the Dangle skill.
During the 24th night, you should focus on continuing to search the landfill and the factory. With your cubs' new skill, they will be able to perform a high jump and follow you to previously inaccessible places.
Remember that there are a lot of dangers lurking at this stage of the game. Watch out for people you pass and pay attention to pop-up notifications on the screen.
If one of your cubs already has the High Jump and Climb abilities, you can now go to the factory to unlock the Dangle skill. You can learn more about skills and how to get them on a dedicated page - Cub skills - how to unlock?.
After leaving the lair, follow the trail of the missing fox. Along the way, try to collect food; you should find a pigeon in the landfill area. There are several bags of garbage lying by the chicken farm. You will also find eggs in the trees there.