Now here's the problem: She said he's not urinating as much as he should/was. I get the impression her vet is more of a livestock vet, and not specifically an equine vet. Of course I advised her to get a hold of her vet about this, and to research bute/renal failure.
I'm VERY conservative in the use of bute. I rarely use it, and when I do, it's 1/2 gram 2x a day. Is there an herb she should give, or is there any reversal if the horse has kidney damage from overusing bute? We've never dealt with any kidney problems like this.
I'll keep posting updates and try to get more information from her.