I was told that Isabel used to be a screamer and a screecher back in her pet shop days and first days in a shelter, but when I got her she'd calmed down considerably, so I never quite heard anything alarming or menacing from her.
BUT! She's one chatty ham! She chirps a lot, sometimes lightly squeaks, and sometimes she'll be chattering and squeaking in her nest. Just today I had to go and check on her as it sounded like she was complaining: wheezing and squeaking under bedding for a few minutes straight. I dig her out and she's just looking at me like "what do you want, woman?! let me be!" Anyway, it's just her way, she's a very chatty ham! Must be those winter white chatty genes in her. Lucy chirps sometimes, but not very often, but Izzie talks a lot!!!
Viola's the chirpiest of my robos. Dora and Leela just do the excited whistling sound, and that's all I've ever heard from them.
Max chirp-squeaks when he drinks water from a bowl
He also squeaks when Hamilton sits on him. They don't fight at all, Max just gets complainy when Hamilton climbs over him in their nest and sits on him for too long. Sometimes I wonder if Hamilton just doesn't realize he needs to move off as I go to check on them and he's just sitting there on pancaked upside-down squeaking Max all deep in thought. "MOVE HAMILTON, can't you see your brother doesn't like it?!!!" He's kinda odd, yeah...