10 sheep can be kept on 5 acres IF you also feed them hay and grain. With sheep as big a pasture as possible because they eat the grass down to the roots in small areas
Hair sheep are better for dog work if you can find them as they rarely overheat. otherwise any fairly non nerotic
http://www.rottweiler.net/rottie/smile.gif sheep will due. Preferably sheep that are used to being worked by dogs. Regular wool sheep MUST be shorn each spring or they overheat and get skin problems
I have rarely seen a rott do badly in herding-bad meaning try to eat the sheep
http://www.rottweiler.net/rottie/smile.gif
Some do not have the instinct to herd but the testers I have spoken to say that rotts have a high pass rate in herding instinct tests
To get herding titles you need to work with an experienced trainer/competitor as it gets complicated regarding patterns
I have 3 generations of herding instinct certified rotts 4 dogs total. All passed with ease displaying lots of instinct. However I do not have the time to drive the 80 miles one way to herding instruction to obtain any herding titles
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Diane
Frontier Rottweilers & Shiba Inu
www.w3-sales.com/frontierrots/main.htm