When you (g) look at US rankings of cities by highest amounts of precipitation (measured in inches per year), I live smack dab between the first and second cities, about a 45 min drive to get to either. I reckon I’d have to move to an actual rainforest to get a wetter climate. Like you alluded to, I’m sure my experience isn’t everyone’s experience. But I agree that a blanket statement that keeping horses in a wet climate is subpar is questionable.
The very first winter I had horses at this property, I had a whole 6’ x 6’ section of my dry lot that had two inches of mud for a bit. I was horrified and it’s since been remedied. Other than that I have had zero mud. Our farm has excellent drainage, which is important on any farm.
Twice in his 12 years my always barefoot homebred had what appeared to be an abscess blow in a hoof. However, since he never took a lame step the jury is still out on if they were actually abscesses. Said horse jogs sound on gravel barefoot. It seems this wet climate hasn’t ruined his hooves yet
Since it rains so much and the ground never freezes, I have green growing grass 12 months per year (I do plant the cool season grass annually).
Anyways, I’m always a bit perplexed when folks talk about how awful wet climates are for horses. Horses seem fine here. Now, if folks opine that beastly hot climates are hard I can understand bc that’s just the truth. It’s hot as hades here right now and it’s sucks big time
As for OP, I keep hay in nets in the run in for my guys right now bc they are using the run in to escape heat and bugs (see above re hot as hades). Despite having grazing year round, I do occasionally need to confine horses to the dry lot. In those situations, I do have hay nets hung outside and don’t worry about if it gets rained on as I’m only putting out a day’s worth of hay at a time. I’ve fed round bales outside without cover when I had more horses and that was ok if a bit wasteful and messy. I dunno that I’d be comfortable putting out say a week’s worth of square baled hay outside to get rained on. But don’t be discouraged about keeping horses in a wet climate! Lots of horses live in wet climates and do perfectly fine.