We’d make a good case study of a civilisation negotiating a critical juncture. I’d dare say we’d be of interest to sociologists and historians, and given where we’re at there might even be something of a careless stampede to gather data before the idiot quadrupeds wipe themselves out. There can’t be that many civilisations going through the hockey stick/environmental catastrophe stage in this galactic neck of the woods at any given time.

As to contact - doubt it’s happened - it’d fuck up the data, and spoil the case study. So long as we keep on ignoring weird stuff because it’s weird the experiment is ok.

As to distances - well, that’s our perception of it - the best we can do is brute force through 3d space - and if they can manoeuvre as they appear to be able to, they may well have some means of travel that is, well, alien to us, such as some variety of extra dimensional travel.