Yes, PARTRIDGES is a Scrabble word!

Letter values in Scrabble US: P 3, A 1, R 1, T 1, R 1, I 1, D 2, G 2, E 1, S 1.

Is it a valid word?

PARTRIDGES is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

flesh of either quail or grouse
heavy-bodied small-winged South American game bird resembling a gallinaceous bird but related to the ratite birds
small Old World gallinaceous game birds
a popular North American game bird; named for its call
valued as a game bird in eastern United States and Canada

Also: bobwhite quail, ruffed grouse, bonasa umbellus.