oh my god i'm so sorry annie
i'm so so sorry
i know just how heartbreaking this is, it will be a year in june since i lost chinchi and it's still awful. not as awful as the couple of months immediately after, i can think of him now and what lovely things we'd done together and sometimes one of the kits does something that he did but i'd forgotten and it's great. i do cry still but not as much.
you do have to separate the boy i'm afraid (at 10 weeks if he's a good weight, i separated my lot just short of 12 weeks but we had all sorts of problems with fluffy not being able to feed so they were slow growers). my boys did not find it too traumatic and they actually were together until they were 5 months old when we had to split them in case they fought. they were ok.
http://hammockyhammocks.co.uk/ do cage buddies and ship everywhere - if you have a look in their stuffies section. ffynn has the strawberry and he absolutely loves it. i have the hearts as well - for other chins but the strawberry is definitely the favourite, he sits on top of it, he sleeps draped over it. he loves his strawberry. and it's fleece filled so it's quite tough if he decides to chew.
it's good that annie has the kits, i'm pretty sure we would have lost fluffy if she didn't have the kits.