My suggie had been making this more the last few days usually when he is asleep or trying to get to sleep, I don't think the other one is making the sound.

How sweet!

I haven't heard this exact song since mine were Joeys.

I'm not exactly sure, but I assumed mine made it when they were looking for their mom.

I'm curious myself.

I just brought home 2 girls last weekend. They were oop in october so about 5 months old now and they make this noise a couple nights a week It reminds me of what my ferret does sometimes.

It sounds a little sad. I would reccomend extra kisses and rubs.