I'm glad to hear the hiccup chirp is normal, as I was worried I was doing something wrong. Mine wicka and chatter quite a lot it's lovely to hear, I would love to know what they are saying to one another.
I've got them quite tame now, They happily take food from me and will sit on my hand to eat food,and let me stroke them. Smudge likes to have the odd nibble at my fingers, but it doesn't really hurt and after all it has to be expected it's just their way. He's what I call the rambuncious one of the 4. Yuki has taken a liking to my t shirts and will happily try to shred them when I have to go into their cage. Max is Insane and loves his Rat wheel he looks very funny going like the clappers in the wheel with a nut in his mouth, he's very like Smudge in some ways. Treacle is the quiet one but she watches everything that is going on. They love Tomatoes by the way.
They all sleep together in the same box, but on the odd occation just lately they've been curled up together on top on their box they look very sweet, Max and Yuki remind me of cinnanmon swirls when they curled up together, and because of the way Smudge and Treacle sleep with them Max and Yuki looked like they've been iced too.
Either way I love them to bits and they ar terribly spoilt, and I think in their own way they love me too.