[Mark H]

Dog would be capable of jogging over 5 miles. Would not be hyper, and could get along with a male english mastiff.

[greenhousethugz]

Check out those animal shelters in town/city, you might be able to find a few dogs that fits your description. Hope this is helpful.

[KerBaer]

A whippet is great!Mine runs with me everyday and they need the exercise- most people think a greyhound - but they really don't, they are used to being kenneled until they actually race. Whippets are very smart- usually around 30ish pounds and are very loyal!Hope this helps! Enjoy our new companion, whatever you choose!!! =o)

[very_vizsla]

vizslas are pretty good. they are a sporting dog that is meant to run all day without getting tired. they also make great family pets & are high energy, but NOT hyper.