When Grandpa says "This job's too delicate for you two, it needs someone with more experience and cunning" and it cuts to Dinky saying "Flattery will get you nowhere, Grandpa", the background plate remains the same.
After Dinky's boot gets stuck he has to take it off, revealing a bare leg that is completely white. The white color always visible between his pants and his boots was clearly meant to represent white socks, but here it looks like he has a sickly white leg.