John Gill Commentary Deuteronomy 15:22

"Thou shalt eat it within thy gates: the unclean and the clean [shall eat it] alike, as the gazelle, and as the hart." — Deuteronomy 15:22 (ASV)

You shall eat it within your gates Though it might not be sacrificed, nor eaten as an eucharistic feast at Jerusalem, it might be eaten as common food in their own houses:

the unclean and the clean person shall eat it alike such as were ceremonially unclean, by the touch of a dead body or the like, might partake of it with those that were clean, no difference was to be made:

as the roebuck and as the hart which were clean creatures, and used for food, though not for sacrifice; see (Deuteronomy 12:15Deuteronomy 12:22) .