Kautilya's Arthashastra 2.30.4

2.30.4

aśvavibhavenāyatām aśvāyām adviguṇavistārāṃ caturdvāropāvartanamadhyāṃ sa-pragrīvāṃ pradvārāsanaphalakayuktānāṃ vānaramayūrapṛṣatanakulacakoraśukasārikākīrṇāṃ śālāṃ niveśayet //

The superintendent shall have a stable constructed as spacious as required by the number of horses to be kept therein twice as broad as the length of a horse, with four doors facing the four quarters, with its central floor suited for the rolling of horses, with projected front provided with wooden seats at the entrance, and containing monkeys, peacocks, red spotted deer (prishata), mangoose, partridges (chakora), parrots, and maina birds (sárika); the room for every horse shall be four times as broad or long as the length of a horse, with its central floor paved with smoothened wooden planks, with separate compartments for fodder (khádanakoshthakam), with passages for the removal of urine and dung, and with a door facing either the north or the east. The distinction of quarters (digvibhága) may be made as a matter of fact or relatively to the situation of the building.