It doesn't seem likely that any of them are going to be able to problem solve what's happening this time. And he hates that, which means he's being aggressively cheerful right now in defiance of his frustration.
"Pretty damn freaky, yeah," he agrees, crouching down to give the rabbit a stroke. "And of course you shouldn't leave her behind. We've all brought along what's most important to us." He grins. "In my case, that's Ianto, but pets are important too!"