In this paper, we deal with the oscillatory behavior of forced second order nonlinear functional integro-dynamic equations of the form $(r(t)x^\Delta (t))^\Delta = e(t) \pm p(t)x^\gamma(\tau(t)) + \int_0^t k(t,s) f(s,x(\tau(s)))\Delta s$, and $(r(t)x^\Delta (t))^\Delta = e(t) + p(t)x(\tau(t)) - \int_0^t k(t,s) f(s,x(\tau(s)))\Delta s$, on time scales $\mathbb{T}$, where $r(t)$, $p(t)$ and $e(t)$ are right dense continuous (rd-continuous) functions on $\mathbb{T}$. Oscillation behavior of these equations has not been studied before. Our results improve and extend some results established by Grace et al. [13]. We also give some examples to illustrate our main results.