Within the Wirelessly Accessible Sensor Populations (WASP) project a research technology prototype has been build of an advanced Wireless Sensor Network (WSN) enabling Smart Dairy Farming. The current integrated WASP solution demonstrated in herd health control test bed can be well used as a research tool for animal and human behaviour scientists to enable data acquisition for periods up to several weeks to study behaviour and, in the end, come up with better models and treatments. Within the WASP test bed for Smart Dairy Farming, the focus has been on remote monitoring of activity-related problems like claw health and locomotion. Encouraged by the large-scale herd control deployment whose operation is limited to 10 to 12 days, we performed an exercise to assess whether it seems feasible to monitor a large number of cows over a period of a year without replacing the 8Ah batteries. Through this exercise, we wanted to get a feeling on application and deployment trade-offs like 1) acceptable time between packets generated at application level, 2) acceptable number of battery-powered mobile sensor nodes, 3) required number and positioning of battery- and/or mains-powered forwarder nodes and 4) required number and positioning of sink nodes, while considering application Quality of Service constraints in terms of size (and hence energy capacity) of batteries, packet delivery ratio and packet delivery latency. Keywords: wireless sensor network, test bed, herd control, locomotion, application