Q. When we are davening on the backyards is there a concern with droppings of animals such as raccoons, cats, birds, etc.?
A. On question 2528 regarding davening when a litter box for cats and dogs is inside that family room, we wrote” Shulchan Aruch (O.H. 79: 4-5), rules that one may daven next to the waste matter produced by animals, if it does not produce a distressing or bothersome smell.
Some Poskim are stringent even when there is no smell, as long as the refuse is still fresh. However, Eishel Avrohom , Avnei Choshen (p.. 410) and others (See Piskei Teshuvos ibid.) maintain that the tradition is to be lenient.
Horav Shlomo Miller’s Shlit’a opinion is to be lenient when there is no smell. Cats usually cover their waste.
Rabbi A. Bartfeld as advised by Horav Shlomo Miller Shlit’a and Horav Aharon Miller Shlit’a