So I just started out this year after being a part timer for a friend last year. Anyways I have a great contract for this one guy but they have two dogs that stay in the back yard. I will be mowing it on Saturday and they actually prefer that since they are at work then. Its only $30 a week but its about 2500 square feet of turf so its a very quick job. I am about to go pick up the check for the mulch job I did for him this weekend. How do I tell them I dont want to mow the backyard (which is only about 10x10) if the dogs are back there? Any help would be appreciated.