A couple of answers on this site (e.g., this one) cite this translation of AV 7.5.5:
Atharvaved 7:5:5:- All those are foolish who use cow, dog or any other animal in yajnas.
From another answer:
Atharva-veda 7.5.5 says:
मुग्धा देवा उत शुनायजन्तोत गौरडैः पुरुधायजन्त
Meaning: Those are foolish who use meat of Dog and other animals in Yajna.
Whose translation are these answers quoting?