To understand the behavior and its small variations originated from changes of the thermal environment and to develop models that simulate the welfare from broiler breeders' answer to the environment constitute the first step for the creation of a system for digital monitoring of broiler breeders housing. In this paper it was developed a system of decision support based on the fuzzy conjuncts' theory to estimate the welfare of broiler breeders in function of frequencies and times of occurrences of behaviors. The controller's development passed for five distinct steps: 1) organization of the experimental data; 2) observation of the videos in interview with specialist; 3) creation of the relevancy functions according to the interviews and the literature revision; 4) frequency simulation of occurrences and average times of expression of the classified behaviors such as indicators of welfare using regression equation from the literature, and 5) construction of rules, simulation and validation of the controller step by step, comparing the results between the simulations. The developed controller satisfactorily estimated the welfare of broiler breeders, having in its version with larger number of rules, estimated about 80% of the experimental data correctly when compared with the answers expected by a specialist. The system can be used as mathematician-computational instrument to support decisions in broiler breeders housing.
fuzzy logic; animal welfare; models of simulation; thermoneutral zone; poultry production
