i would do a sand test next month. Just take a couple of his poop balls and throw them in a bucket with some water. let it sit for a while, maybe a half hour ish, let the poop dissolve, then slowly dump out the water and see if there is sand/dirt on the bottom of the bucket. I'm not sure you need to spend the money on sandclear if you dont have an issue... do you have sandy soil? Is he in a dirt paddock?
If you sandclear, you generally do it once a month for 7 days.
"Be a best friend, tell the truth, and overuse I love you
Go to work, do your best, don't outsmart your common sense
Never let your prayin knees get lazy
And love like crazy"