  We study local boundedness and H\"older continuity of a parabolic equation
involving the fractional $p$-Laplacian of order $s$, with $0<s<1$, $2\leq p <
\infty$, with a general right hand side. We focus on obtaining precise H\"older
continuity estimates. The proof is based on a perturbative argument using the
already known H\"older continuity estimate for solutions to the equation with
zero right hand side.
