I have a dog with a sensitive stomach, so I thought I would try this for her. She already gets probiotics in a powder, so I thought we would add prebiotics into the mix. You get 24 individually wrapped packets of these, so I feel like the price is very reasonable, and they are perfect for travel (when dogs can be more likely to have stomach upset due to the stress of travel, change in water composition, being in a new location, etc.).My youngest dog has had a bit of an upset stomach this week so I thought I'd try her on it. The packet tears open easily, and I have to admit, I didn't like the smell at all. But my dog had no such problem -- she licked it right out of the packet, and then my other dog came over and she wanted one, too, so clearly this is viewed as a treat, not medicine. That's great, because I'm always mixing supplements into their food, and it's nice to have something they will eat without me having to disguise it.It only comes in chicken flavor so far, and chicken is a primary ingredient. While it's good that it's made from real meat, and there aren't a lot of other ingredients or fillers you have to worry about, chicken is the protein that dogs tend to have the most issues with as far as food allergies or intolerances, so I would have liked to see another option like turkey, beef, pork, lamb, etc. I also can't figure out where this company is based, which is a concern, and I find it a bit troubling that the company uses a vet to promote the product but doesn't include the vet's last name. I feel like if the vet is endorsing the product, their full name should be included; not doing so makes it suspect in my mind.As far as does it work...I'm not sure. Her stomach seems to be doing better, but this was added to a regime of other products to help with the upset stomach, so I can't say for sure what's helping right now. I'm hopeful that this will be effective for regular use based on the ingredients and my dogs are hopeful (because they think these are yummy and would like to get them more often).