Apart from the lack of movement are there any other reasons for a swollen sheath. I noticed the other night chunky was really swollen and tight. So I lunged him and then took him for a walk in hand whilst I did the rounds on the sheep and cows. By the time we got back it had gone down. Hasn't come up since. Hes out 24/7 but it's been hot so I'm wondering if hes just been standing around. Although when I looked out he was always in a different place in the field. Hes had no riding or driving for about 10 days as I've been so busy with hay making. Wonder if hes just not moving enough with old age, or something else.