I guess my first rule out is XCHT - are there active GB points? Otherwise, you could be looking at a HT-KI dis-integration without necessary having the TB obstruction. When the HT and KI separate, the upper burner gets hotter and the lower burner gets colder. This creates PU/PD. Qi is not generated since Yang and Yin are not mingling, leading to loss of appetite. If there are no active GB points in these animals, BWDHW is a safe place to start, since it nourishes both Yin and Yang, and in so doing, generates Source Qi which, in turn, drives appetite.