The answer is "gums".
They sit in the hen house on eggs, on the roost or in a nest.
A broody hen is easy to spot. The hen will remain on the nest when the other hens are going about their daily routine. The hen will often be aggressive when you reach in to remove her eggs. If you remove the hen from her clutch of eggs she will often run right back to the nest, protesting loudly. The broody hen will not roost with the other birds but remain on the nest over night.
The hen can take short periods off the nest and it will not hurt the brood. A period of over an hour or two may do damage to the brood.
A brooding hen is when a hen is raising chicks, protecting them, teaching them to find food, and hovering over them to keep them warm.
If the hen has eggs, she is trying to protect them.
The answer is "mare".The expression "as scarce as hen's teeth" means that it doesn't exist (because they don't). The original meaning of "mare's nest" is something illusory--or doesn't exist.In addition to the parallel meaning between the two expressions or idioms, there is also a parallel construction, with a possessive in each case: hen's teeth; mare's nest.This is important in an analogy question, which requires an exact parallel for the answer to be correct (A is to B as X is to Y).The parallel construction provides the test against which other "possible" answers to this analogy can be tried. There are plenty of things that don't exist, for example, but only one expression or idiom that shares with "hen's teeth" both meaning and the possessive construction.
when then
They sit in the hen house on eggs, on the roost or in a nest.
If it has eggs in the nest.
nest?
A broody hen is easy to spot. The hen will remain on the nest when the other hens are going about their daily routine. The hen will often be aggressive when you reach in to remove her eggs. If you remove the hen from her clutch of eggs she will often run right back to the nest, protesting loudly. The broody hen will not roost with the other birds but remain on the nest over night.
she\well\take\to\the\nest
The hen can take short periods off the nest and it will not hurt the brood. A period of over an hour or two may do damage to the brood.
hen's teeth
Example sentence - She had to move the hen off the nest in order to pick up the eggs.
Air. Beaks dont have teeth
Farmers used to leave one egg in the hen's nest to encourage her to have more eggs.