Let A be an n$ imes$n (0,1) matrix. Let f(A) denote the smallest nonnegative integer k such that per A[$alpha$｜$eta$]>0 and A($alpha$｜$eta$) is permutation equivalent to a lower triangular matrix for some $alpha$, $eta$$in$Qulcorner,ulcorner. In this case f(A) is called the feedback number of A. In this paper, feedback numbers of some maximal convertible (0,1) matrices are studied.