Impure parts of sacrificial animal
shatapatha brahmana 18.104.22.168 :
yatra vai devāḥ | agre paśumālebhire taṃ tvaṣṭā śīrṣato'gre'bhyuvāmotaivaṃ cinnālabheranniti tvaṣṭurhi paśavaḥ sa eṣa
śīrṣanmastiṣko'nūkyaśca majjā tasmātsa vānta iva tvaṣṭā
11. For when the gods, at first, seized an animal to sacrifice), Tvashtri first spat upon its head, thinking, “Surely, thus they will
not touch it!” for animals belong to Tvashtri. That (spittle became)
the brain in the head and the marrow in the neck-bone: hence that
(substance) is like spittle, for Tvashtri spat it. Let him therefore
not eat that, since it was spitten by Tvashtri.
anushasana parva XCIV:
"Bhrigu said, 'Let him who has stolen your stalks censure when censured, assail when assailed, and eat the flesh that is attached
to the back-bone of animals (slaughtered in sacrifice)!'"
markandeya purana XXXIV:
“He should never eat flesh from the back, or flesh unfit for the gods and pitṛs, or prohibited flesh, my son, or things which are visibly salt.
No FEMALE animals as per shatapAtha brahmaNa Kanda XI, adhyaya 7, brahmana 1 & padmapurANa-bhumikhanda-ch45:
3. Now, when he performs the animal offering. he thereby redeems himself--male by male, for the victim is a male, and the Sacrificer is
a male. And this, indeed, to wit, flesh, is the best kind of food: he
thus becomes an eater of the best kind of food. Let not a year pass by
for him without his offering; for the year means life: it is thus
immortal life he thereby confers upon himself.
“I shall not kill this female (hog). O dear one, the deities have indeed seen a great sin in killing a female (animal). Therefore one
should not kill a woman. Nor shall I send anyone (to kill her). O
beautiful one, I am afraid of committing a sin by killing her.”
Only animals with permanent teeth as per aitareya brahmaNa book 7 chapter 3:
Harischandra said, “An animal is fit for being sacrificed, when it is more than ten days old. Let him reach this age, then I will
sacrifice him to thee.” Harischandra answered, “An animal is fit for
being sacrificed when its teeth come. Let his teeth come, then I
will sacrifice him to thee.” He answered, “An animal is fit for
being sacrificed when its teeth fall out. Let his teeth fall out,
then I will sacrifice him to thee.” “An animal is fit for being
sacrificed when its teeth have come again. Let his teeth come again,
then I will sacrifice him to thee.”
gobhila grhya sutra PRAPÂTHAKA IV, KÂNDIKÂ 1:
3. They cut off the Avadâna portions from all its limbs,
4. With the exception of the left thigh and the lungs.
5. The left thigh he should keep for the Anvashtakya ceremony.
asvalayana grhya sutra KANDIKÂ 11:
10. To the west of the Sâmitra (fire) he (the Samitri) kills (the animal), the head of which is turned to the east or to the west, the
feet to the north; and having placed a grass-blade on his side of the
(animal's) navel, (the 'performer') draws out the omentum, cuts off
the omentum, seizes it with the two Agnisrapanîs, sprinkles it with
water, warms it at the Sâmitra (fire), takes it before that fire,
roasts it, being seated to the south, goes round (the two fires), and
11. At the same fire they cook a mess of food.
Distribution of parts of sacrificial animal
aitareya brahmana Book7 ch 1 :