Gives the Stray a random chance to drop 0-2 (average 1) snowballs, snow, or ice when killed, plus a small chance to drop a packed ice, blue ice, or powder snow bucket, with powder snow bucket being gated to versions of the game where it is present (1.17+). Otherwise leaves the vanilla loot table unchanged.
Drop the corresponding datapack file into the datapacks directory in your save file and you're good to go. Remove the file with /datapack disable or by deleting/moving/renaming the file. The datapack leaves the world fully compatible with vanilla.
Important note: datapacks completely overwrite any loot tables they modify; other datapacks that modify the Stray's loot table may overwrite this one or get overwritten by this one (this is determined by the order in which the datapacks are loaded)