Verified
Jennifer Walsh·2026-05-23
My dog used to have the worst gas but since starting these chews it's been so much better omg
3-in-1 Probiotic & Multivita Chews
4.7 (283 reviews)
- Walks you both actually enjoy again
- A dog who bounces back from the bad days
- Vitamins their bowl keeps missing
Two chews. Finally, a healthier dog who can handle the day.
Gut approved
The longer, the better. So stock up
Free shipping
Happy Tummy Guarantee
Compounding effects
You know the look. Half a bowl, sad eyes
The soft pile on the rug. Dinners they walk away from. Every big event, whether it's a storm rolling in or your suitcase coming out. The anxiety breaks your heart. That's the dog this was made for.
Two chews, healthier dog
Stress hits, gut goes sideways
Stress unsettles the gut. Probiotics rebuild it. Vitamins fill what stress and poor eating left behind.
Less gas✦Firmer stools✦Calmer stomach✦Shinier coat✦Probiotic gut rebuild✦Strains studied in dogs✦Real pumpkin✦Wild Alaskan salmon oil✦
Less gas✦Firmer stools✦Calmer stomach✦Shinier coat✦Probiotic gut rebuild✦Strains studied in dogs✦Real pumpkin✦Wild Alaskan salmon oil✦
How the chews work
From imbalance to happy tummy
The anxious dog story - Sarah K.
The night of the fireworks
"Murphy is a rescue, and his stomach has always been his weak spot. The first Fourth of July after we adopted him, the fireworks started early and didn't stop. He hid in the bath. He wouldn't touch dinner. By morning the kitchen looked like a crime scene and he was shaking on his bed, refusing water."
"I felt like the worst dog mum in the world. I didn't want another night like that, and I didn't want him to spend his life bracing for the next loud noise. We started Tesswyn a few weeks later. By New Year's Eve, he ate his dinner. He still hid for a bit, but his belly held. He climbed up on the couch with me before midnight. That was the moment I knew."
— Love, Sarah K. Rescue mom to Murphy, 4
Our probiotic-vitamin blend
Scientifically studied
What to expect
Three turning points
Week 1–2
The gut quiets down
Most dog parents notice less gas first. The bloated post-dinner walk gets easier, and the smell stops clearing the room.
Week 3–4
Stools get consistent
Soft piles get rarer. The pickup on your morning walk feels like a normal pickup again, even on stressful days.
Week 5–6
The gut stops overreacting
Stressful days still happen. But the stomach drama that used to follow them starts to feel less inevitable. Some triggers pass without leaving a mess behind.
Week 7–8
The whole dog feels different
Coat brighter. Skin less itchy. Energy steadier. The multivitamin layer starts to show up on the outside.
Vet endorsed
"The Bacillus subtilis strain is what convinced me..."
"The probiotic survives stomach acid, and germinates in the small intestine. It's perfectly combined with the multivitamin as dogs eat less during stressful periods and don't get their full nutritional intake."
Dr. Emma Nowak, DVM
Licensed Veterinarian · Canine Nutrition Specialist
Disclaimer: Tesswyn is a daily wellness supplement and is not intended to diagnose, treat, cure or prevent any disease. Always consult your veterinarian if your dog has a persistent or severe health concern.
Risk is on us
Happy Tummy Guarantee
If the gas, bloating, soft stools or upset belly aren't easing up after a fair run with Tesswyn, we'll make it right. Full 100-day Happy Tummy Guarantee, no fine print, no hoops.
For the bowl they barely touched
Stressed dogs eat less, and miss more
Dogs that eat less during stressful periods don't get their full nutritional intake. That's where the multivitamin layer comes in, along with wild Alaskan salmon oil for skin and coat, and real pumpkin to keep things moving without drama.
It's the quiet upgrade your dog gets in the same chew they already consider a treat. Coat, skin, steady everyday energy, all covered.
Everything inside
The full label
Glucosamine HCl (shrimp and crab)200 mg
Methylsulfonylmethane (MSM)100 mg
Lactobacillus plantarum, Bacillus subtilis, Enterococcus faecium500M CFU
Wild Alaskan Salmon Oil95 mg
Coconut Oil95 mg
Pumpkin Powder200 mg
Vitamin A1000 IU
Natural Vitamin E4 IU
Vitamin B2 (Riboflavin)1 mg
Vitamin B6 (Pyridoxine)1 mg
Vitamin B9 (Folic Acid)0.22 mg
Vitamin B12 (Methylcobalamin)0.005 mg
Vitamin D30.002 mg
Vitamin C (Ascorbic Acid)20 mg
Inactive ingredients: Duck, brewers yeast, coconut glycerin, natural hickory smoke flavour, rosemary extract, sunflower lecithin, tapioca.
Good questions
FAQ
Customer reviews
4.7 out of 5
Based on 283 verified reviews
Verified
Paulette Hines·2026-05-21
I adopted Gracie six months ago and she came with a lot of anxiety, which showed up as constant gas and loose stool. I started these chews after my vet mentioned them and the change has been so noticeable. Her poops are solid now and she seems way less uncomfortable after meals. My whole family has commented on the improvement.
Verified
Marcus Thompson·2026-05-20
Seriously these work, Biscuit's tummy is so much calmer now especially on car rides
Verified
Donna Perez·2026-05-17
Love that it's all in one so I don't have to give her like 3 different supplements
Verified
Greg Mitchell·2026-05-14
My vet actually approved these and now Rocky's stools are so much more solid lol finally