I was just talking tripods with one of my sheep hunting buddies last night and this same topic came up. We both carry full height tripods for sheep hunting, but almost never use them with more than a few inches of extension on any of the legs.
I have a Velbon Ultra Luxi 2 that I've used for years and I really like a lot of things about it. The twist lock system they use on some of their tripods is my favorite by far. Very quick and easy to deploy and break down. Unfortunately, after more than a decade of hard use, the head on the tripod has developed a little bit of wiggle that is super annoying and very problematic in the wind, especially when trying to judge horns or count rings or brow tines at distance. Being right at 2lbs, it is hard to find a suitable, similar replacement.
I picked up a Manfrotto Be Free Carbon as a replacement a few years ago but really don't like it. It is super solid and relatively light for the size, but I really dislike the twist lock system on the legs as compared to the Velbon.
I was just eyeing the Black Ovis carbon "sitting" tripod a few days back. Seems like it could be a good solution. 1.7lbs is very nice. I don't like pan heads though, which is the only thing holding me back from buying one of those.
In my opinion, you definitely don't need a full height tripod for sheep hunting. Removing sections of legs or getting a shorter/sitting tripod is the way to go to shed some weight from a critical piece of gear.