An excerpt from the book Hindu Dharma The Universal Way of Life,( Bharatiya Vidya Bhavan publication) contain speeches of Sri Sri Sri Chandrasekharendra Saraswathi MahaSwamiji (at various times during the years 1907 to 1994). available, in this link gives clarification on this.
https://www.kamakoti.org/hindudharma/part5/chap24.htm
Asvalambham gavalambham sanyasam palapatrikam
Devarena sutotpattim kalau panca vivarjayet
Asvamedha sacrifice, gomedha sacrifice, sannyasa,etc. these things are forbidden in this age"
Brahma Vaivarta Purana
(Kṛṣṇa-janma-khaṇḍa 185.180
Ref.courtesy
vanisource.org/wiki/CC_Adi_17.164 –
The following are to be eschewed in the Kali age: horse and cow sacrifices, meat in the sraddha ceremony, sannyasa.
Hindu Dharma The Universal Way of Life