for the first time in my life, i had a new customer request mowing, and a fert program, and.....weekly dog poop removal. huge german sheppard, who apparently eats very well. ive never done this, dont know what to charge, my helper did it one time, got half thru, handed me the shovel, and said no way, he aint doin it. actually, it really doesnt bother me to do it myself, i just dont know how to charge. any of u folks experience this? how much?