Lacy strong and fast. The constitution of the dog is light, but the height-weight ratio is proportional. Height at withers 18-21 inches (46-53 cm). Depending on height and working conditions, the weight should be approximately 25-45 lbs (11-20 kg) for bitches and 35-50 lbs (16-23 kg) for males. The standards specified in the parallel congressional resolution of Texas No. 108 differ slightly: height between 18-25 inches (46-63 cm), weight between 30-50 lbs (14-23 kg) from 2005.