釋氏要覽 2.115

2.115

薩波多律攝云。大寺內為防守故聽養狗。須知行法。若瓟損塔并房院地應平填。若遺下應除去。不爾者得惡作罪。

The Sarvāstivāda-vinaya-saṃgraha says: 'In a large monastery, for the sake of defense, keeping dogs is permitted. One must know the rules of conduct: if they dig up and damage the grounds of a stūpa or monastic quarters, they must be filled flat; if they leave droppings, they must be removed. If not, one incurs an offense of wrong-doing (duṣkṛta).'