There’s several variations due to varying languages, dialects, and such but I always heard what he’s referring to phrased like this: > ”The chicken is involved

There’s several variations due to varying languages, dialects, and such but I always heard what he’s referring to phrased like this: > ”The chicken is involved but the pig is committed.” That is, while both are needed to make breakfast, the pig has a bigger stake in the project. The chicken may be providing the eggs but the pig is being eaten!