Bucky clenched his jaw and took a deep breath in, willing himself not to lose his temper over something so stupid. He knows that Tony doesn't mean any harm with his dumb nicknames, he knows that there's no need to get bent out of shape, it's just because everything else is already wearing on his last nerve.

Thankfully, Bruce stepped in to take over the explanation, before Tony could alienate everyone in a room as seemed to be his particular talent.

"I'm afraid that that's true, there's canine DNA mixed with yours in a way that we've never seen before. It doesn't seem to be actively harmful, your vitals all read steady and strong, but we need to get hold of the original dog even more urgently than ever."