Drop anyone for Decker or Hardesty? (Addai/DHB/Little?)

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My team is having some bye week and injury issues. Decker and Hardesty were just dropped.

Should I drop anyone for one or both of those players?

With my WR situation, I'm leaning toward dropping Addai for Decker, but it might also be worth going after Hardesty to handcuff Hillis.

12 team league - 0.5 PPR - QB,2RB,2WR,W/R,TE,D/ST,K
(current week 7 starters in bold)

QB: M. Stafford
RB: D. Sproles, J. Battle, R. Torain, L. McCoy (bye), P. Hillis (inj), J. Addai (inj)
WR: R. Wayne, G. Little, M. Manningham (bye), D. Heyward-Bey
TE: J. Witten
D/ST: Detroit
K: J. Kasay