Buttermilk: Substitute an equal amount of soymilk mixed with lemon juice. Allow the mixture to thicken 5 minutes before using. Or substitute an equal amount of vegan sour cream substitute diluted half and half with water. 1 cup buttermilk = 1 cup soymilk with 2 Tblsp lemon juice allowed to sit 5 minutes. 1 cup buttermilk = 1/2 cup vegan sour cream mixed with 1/2 cup water. Sour Cream: Use a vegan sour cream substitute.
Lay down aged cow manure as a top dressing over recently mowed grass. Use bagged commercial aged manure or buy from a reputable bulk dealer. Manure can be used to top dress grass once or twice a year, with the first application in the early spring and the second in the early fall.
So another good way to control parasites and put manure to good use is to spread cow manure on a horse pasture and horse manure on a cow pasture. Read more tips on how to compost horse manure. Compost is a rich soil enhancement that improves the health of both plants and soil and helps retain moisture.