  I consider anomalies in effective field theories (EFTs) of gauge fields
coupled to fermions on an interval in AdS_5, and their holographic duals. The
anomalies give rise to constraints on the consistent EFT description, which are
stronger than the usual four-dimensional anomaly cancellation condition for the
zero modes. Even though the anomalies occur on both boundaries of the interval,
corresponding to both the UV and the IR of the holographic dual, they are
nevertheless consistent with the non-renormalization of the anomaly and the 't
Hooft matching condition. They give rise, in general, to a Wess-Zumino-Witten
(WZW) term in the four-dimensional, low-energy effective action, whose form I
compute. Finally I discuss the relevance to holographic models of electroweak
symmetry breaking. I show that the so-called `minimal composite Higgs models'
have a consistent EFT description without a WZW term. In contrast, a variant of
an earlier model of Contino, Nomura, and Pomarol does have a WZW term.
