"Oh, I have noticed," Sirius assures him with a teasing grin. In the dead of sleep, it's been quite a shock and has made him quietly grumpy on more than one occasion, but the reminder that at least Kieren has working bloodflow at all now is enough to calm him. "If those frigid feet aren't enough to have me skittering away, I can't imagine a second little cat would do it. Provided he or she doesn't start clawing at me in the middle of the night, I suppose."