Different for you as you are not losing one through death, but sure there will be someone with some advice our eldest one pined badly when we lost his brother last year he became very depressed if he wasnt laying in his bed he was at the gate looking up and down the road looking for monty to come home it was heartbreaking.

We was told that he would have excepted it better if we had taken him to see his brother being p.t.s, i didnt know this and at the time he was going for one of his usual checks and although we knew his time was very close we didnt know it was going o be hat night.So ime sure thare will be a process you can go through. good luck with them both.