Can you spot what is unusual in this picture?
No, not the way Rusty is walking. That would be perfectly normal.
Notice that Q-Tip is with Natasha and Kiska (Frankie is up front with Cheoah).
Why? Well, Qannik was doing too much goofing off on this walk. Walking between Queen Natasha the Evil and her Princess of Darkness, Kiska, can be quite helpful sometimes. Funny how that works.