Egg yolk is the part of an egg, or just part of the egg cell in non-egg laying animals that feed the developing embryo in animals.
In whole eggs, 43% of the protein in eggs comes from the yolk.
So can hamsters eat egg yolk?
Yes they can, it is fine for them to eat.
However it is better for them to eat when it is hardened as they can’t eat runny foods easily.
So if you are boiling an egg then over cook it so the yolk is hardened.