It is such a skill, not like people or horses where even a lay person can get some idea, it is such a blurry jumble wih sheep. With only 5, by far your best bet is to try to find someone who will let you bring your sheep to their scanning, as others have said, I don't think anyone would want to set their kit up for 5, our scanning man scans 840 ewes in 5 hours, but it takes a good half hour to set up and an hour to dismantle as everything has to be disinfected. I know he charges a set up and dismantle fee for less than about 100, but I don't know how much that is. We pay 55p/ewe scanned.