I just got a new horse a few weeks ago, and I always spend at least a month freaking out about every little thing when I get a new horse. I have noticed recently that he seems to pee a lot. Yesterday, I took him out for a trail ride and he peed in his stall before I got him out, at the hitching post while I was tacking up, during the trail ride, and again as I was untacking. This seems really excessive. He also poops a lot on the trail, but it is little poops. Toward the end of the ride it starts to get really runny. I think the pooping might be something to do with nervousness (he's only 3 and has only been on trails for a week or so) but if he's nervous I find it odd that he would stop to pee with me on his back. He has been regularly de-wormed, his diet is good. I have noticed his lympth nodes slightly swollen for a few days, but otherwise he seems fine. He is bright and has energy, he eats and drinks just fine. Any thoughts? Is this enough to call out the vet? I don't like to call the vet unless I have a really good reason, obviously. Advice?