Our promise to your dog
The Happy Tummy Guarantee
We built Tesswyn for the dogs whose tummies fall apart at the slightest stress, and for the people who love them. Both the research and our customers see results in weeks. We know this works, so you get the full Happy Tummy Guarantee for 100 days! If you don't see the positive change, we'll make it right.
Results come fast
Most dogs feel different in weeks
The gut quiets down, stools firm up, and stress stops landing in the stomach. The 100 days are a bonus, not a wait time.
The 100 days, explained
Why we put the risk on us
What we promise
A calmer gut, firmer stools, and a happier-feeling dog. If you don't see the change, you reach out, and we make it right. No quiz to fail, no fine print to decode.
Why a full 100 days
Not because it takes that long to work, most dogs feel different within weeks. The 100 days are there so you can give the routine a fair run, see your dog through a few of the usual triggers, and decide on your own time.
Why we can stand behind it
The formula is built around ingredients studied in dogs and in transferable human trials for the exact problems we're trying to solve. We're not throwing supplements at the wall. We're confident enough to put the risk on us, not on your dog.
No risk to your dog
Try Tesswyn, risk is on us
Real ingredients, a science-led blend, and the 100-day Happy Tummy Guarantee.
Get my dog feeling better