Cold/flu

Have you tried saline nasal spray?

Use saline spray and suction for nose that will give quick relief time to time

I used saline (1-2ml) water and injected it in the nostrils with a syringe. After a few minutes sucking gently with the aspirator. Doing it every time I felt she was struggling breathing from her nose. A few days or sucking transparent/yellowish mucus and now she's better. Unfortunately when they are so little there's not much we can do. You can also try with steam baths, but you also want to avoid too many baths as their skin is very sensitive now. But that is also an option.