The venom of the black widow spider contains poisonous chemicals that make people sick. Black widows are found throughout the United States, mostly in the South and West. They are usually found in barns, sheds, stone walls, fences, woodpiles, porch furniture, and other outdoor structures.
Some types of grass hay, in dry weather conditions or on dry ground, will be much too dry when baled as small bales using the eight to 15 percent moisture (the traditional rule of thumb) as a guide. Some of this grass hay produces the best quality bales when baled at 24 to 30 percent moisture.
Chances are if you baled your hay too wet (over 15% moisture) there is a risk of prolonged heating. Moisture levels above 20 percent allow the respiration process to continue and mould to develop, producing heat. When hay heats beyond 100 F (38 C), browning or carmalization occurs.