Hi, Pam. I have mild allergies which cause my eyes to weep. I just give them a drop or so to the corner of each eye which cleans them up promptly. I have a cat as well, so I know that they don't like being "doctored". Up here in the Frozen North (halfway between Seattle and Alaska) the critters only have access to the water I give them, which contains CDS. Their only other choice is to eat snow right now and I find that they all, the cat as well, prefer the CDS . Even the crows come for a drink! I'm expecting that with the constant maintenance with CDS, there won't be any disease.
Yes, It's just prophylactic and I expect it always will be! :>)