Thanks all

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Yeah we are pretty much used to long walks with Bruno. There is a wilderness park/preserve not too far, usually take them there for at least an hour in the morning. In fact took little Loki there this morning with Bruno. The older dog Bruno tends to go into hunt mode over all the little critters there.
GSPs are pretty high energy that is for sure. They have to have a long walk every day or they go batty. The older dog often I end running him on my bike for about 20min then take him for a walk, otherwise he is handful.