I'm not sure you can get one at walmart. They do have probiotics for people, but they are like specialty products and usually pretty expensive. If you do get something, it needs to be in capsule that you would be able to open and get the powder out. You would have better luck at a petsmart or petco, or a health food store, or horse feed store.
If you can't get something tonight, you'll be ok til tomorrow or maybe even til Mon., but you should get it as soon as possible.
If you can't get something tonight, you'll be ok til tomorrow or maybe even til Mon., but you should get it as soon as possible.