I do not know, but the deer might have been eaten by a wolf or a dog or by the boars that flock together or the tiger who travels alone.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
अपि च न वृकः सालावृकोऽन्यतमो वा नैकचर एकचरो वा भक्षयति
api ca na vṛkaḥ sālāvṛko'nyatamo vā naikacara ekacaro vā bhakṣayati
SB 5.8.18