Fluffies are highly empathetic, so a bad fluffy mother is rather uncommon. Any unfortunate foals that happen to be birthed to one have pure bad luck.
A “bad mummah” often ranks her babies as follows, best to worst:
Foal that looks most like the mother
Foal that looks most like the mother’s mate
Any healthy foals that don’t look like her or her mate
Alicorns and foals of her least favorite color (Least favorite color can be any color, not just brown or green)
Runts (Underdeveloped foals, emaciated newborns, foals with less than/more than usual limbs even if these abnormalities don’t cause them suffering) (Runts in general do not include those with mental disabilities, lazy eyes, or foals with more of a speech impediment. They are treated as normal foals.)
A normal fluffy mother will not reject a baby unless her instincts tell her that it is too weak to survive. If that is the case, the mother will quickly kill the unhealthy foal and eat it to make extra milk for her other foals. She does her best to do it out of sight/hearing range of her foals, and does not enjoy the process. She does not discriminate based on fur color, disability or breed.
A “bad mummah” will have zero problem abusing/neglecting her foals. She will also have no problem using certain foals as a cleanup tool for bodily waste. They often have a favorite foal, who they spend all their time coddling and nursing. They call this their “bestest babbeh”.
She often neglects the other foals or outright acts like they don’t exist. If another foal comes up to the mother, she will beat it and send it away. If it bothers her too much, she kills it in front of the other babies. Bad mothers have little to no empathy for anyone around them and are sociopaths as well. These are high signs of an incurable smarty complex. The other babies are usually fed barely or not at all.
The “bestest babbeh”, at first, will wonder why its mother isn’t feeding its siblings as much. It will ask why the mare isn’t giving as much. The mother often responds with “Because babbeh am bestest babbeh. Mummah nu wuv othew babbehs.” For a while, the favorite foal will not understand why it is treated better than all the others, and will be saddened by its mother’s negligence to its siblings. “Bestest babbehs” are not allowed to play with the other foals because the mare is disgusted by them.
If the mother bothers to explain and try to convince the favorite foal that it is the best, the foal may develop a smarty complex due to overinflated ego as a result. If it is stopped early enough, the smarty complex can be treated and sometimes cured.