My recently aquired female llama (about 4 years old) Is pretty thin. She is a bad eater although on good grazing, free choice quality hay, alfalfa pellets and browse. My other llama is rather on the portly side (the female is the dominant one) They have been wormed with ivermectin and fenbeddazole and the droppings are normal. The llama is drinking several times a day We are having a horrible heat wave here in N. Florida right now and the humidity ensures that we are all in a puddle of sweat. Could this have any bearing on the problem ?