I have a Gelding with a swollen sheath and lump in front of his sheath on his stomach area. This comes and goes- We have him in a smaller pasture where the barn is where we provide hay, grain and water daily (there is little grass beacause he eats it up so fast). His sheath swells and he gets this lump the size of a hand, it's squisy not hard. One time we gave him antibiotics and it went away. The next time it came up we moved him to the larger pasture were after about 2-3 days of eating grass all day long the swelling and lump went away. This has happened about 4 times.. He acts and seems perfectly fine with no problems.
I'm just wanting to figure out-- Is he getting too Much protein from the hay and grains to cause this? So whenever he gets the grass in him it evens out? Is this possible?