A while back I got some digestive enzymes. At the time I did not know it had magnesium and calcium in it. I've been feeding it and there doesn't seem to be any issues, but I've been wondering if I should get a different brand because Poppy had a struvite stone last year. The trouble is I've scoured the web and can't find any other enzymes that I'm 100% happy with. They all seem to be missing something or have something objectionable in it. The thing I like about this one is that it has bromelain, which can help with hairballs. The analysis says for 750 mg or 1/2 tsp. this product has 9.7 mg magnesium and 24 mg calcium. I feed 1/32 tsp. twice daily. Is this something to worry about?