1.   They had shown that the greater the number killed, the bigger the average litter size would become.

2.   In Texas, he says, limiting the coyote population has actually decreased litter size.

3.   Litter sizes are dependent on environmental conditions, Phelps said.

4.   The larger litter size is one result of the trend toward larger, factory-style hog farms, in which hogs are raised in air-conditioned buildings.

5.   Friendly pats and strokes ease stress, and increase litter sizes.