This won't help your problem, but do realise they are obviously very happy to be in your house. All siblings quarrel, but most are only really badly behaved at home, and can be little angels outside in the real world. Even to the extent of defending each other against outsiders 
Recommendations for Cork Ireland
Good Morning Thursday 15th October 2026
Your username explains how you die , how do you die?



Of course, if you are on your own, that doesn't help.Be stern with them about the bickering.