@bbakhtavar
For a while, they were gone, and I was worried about them. But today, one of them came back. I quickly grabbed a piece of grilled meat from the fridge and went into the yard. The others weren't there, just the one. I'm not sure if you can hear the sound of its meowing, but I feel like it was thanking me. I think it was really hungry. I hope the others are safe and come back too.