This is a specific conversation about Small dog dental health — why it matters so much — ask about yours and get one honest answer for your exact situation.
inparticular.ai
It sounds like the dental chews were doing more harm than good — loose stools are a really common reason owners have to ditch them, especially in small breeds whose digestive systems can be sensitive to the bulking agents and starches packed into most chews. Small breeds like Shih Tzus are actually disproportionately prone to dental disease because their teeth are crowded into a much smaller jaw, which means tartar and gum disease build up faster than you'd expect — and it's one of the most common sources of chronic pain that owners don't realise their dog is dealing with. So finding something that works for your dog specifically really does matter. Can you tell me a bit more: has your vet flagged dental concerns at checkups, and is your Shih Tzu generally okay with having their mouth handled, or do they put up a fight?
She's 4 years old, the vet mentioned at her last checkup that her teeth were starting to look a bit gunky but not bad enough for a scale yet. She tolerates me touching her mouth — she's not thrilled about it but she doesn't run away.
inparticular.ai
That's actually a really good window to be in — early enough that consistent home care can genuinely hold things at bay and potentially avoid a scale and polish under anaesthetic. The fact that she tolerates mouth handling means you have options beyond chews. What I'd want to know before pointing you at something specific: were the chews the only dental routine you had, or were you also doing anything else? And do you know which chews she was on — some are far worse culprits for digestive upset than others.
Just the chews, nothing else. She was on Whimzees — the little toothbrush-shaped ones. Seemed fine for a few weeks then the loose stools started. Vet said it was probably the potato starch in them.
inparticular.ai
Your vet is almost certainly right — Whimzees rely heavily on potato starch as their base, and some dogs, particularly smaller ones, just can't process that volume of starch regularly without it affecting their gut. The good news is that since she tolerates mouth handling, you don't actually need a digestible chew at all. My clear recommendation for your situation is the Vet's Best Enzymatic Toothpaste and Toothbrush Kit. It uses a dual-enzyme system — glucose oxidase and lactoperoxidase — which actively breaks down plaque and fights bacteria rather than just mechanically scrubbing. For a Shih Tzu at this stage, used three or four times a week, it will do considerably more than a chew ever could, and there's nothing in it that will upset her stomach because she's not swallowing a meaningful amount. The brush is soft and sized well for small mouths. It's widely available on Amazon UK and costs around £8–10 for the kit.
That makes sense. Is the toothpaste safe if she does swallow a bit? And how long before I'd expect to see a difference?
inparticular.ai
Yes — it's formulated to be safe if ingested in the small amounts that happen during brushing, and it's poultry-flavoured so most dogs actually don't mind it, which helps a lot with compliance. As for timing: if you're brushing consistently three or four times a week, you should notice less visible buildup at the gumline within four to six weeks. The more important marker is what your vet sees at her next checkup — if you can tell them you've been brushing regularly, they'll be able to give you a direct before-and-after comparison. Given she's only 4 and the vet said it wasn't bad yet, you're in a genuinely strong position to keep it that way without needing intervention.
Great, I'll give it a go. Should I introduce it gradually or just start brushing properly straight away?
inparticular.ai
Gradually is smarter, even though she's cooperative. Spend two or three days just letting her lick the paste off your finger so she associates it with something positive. Then introduce the brush without any brushing motion — just let her mouth it. By the end of the first week you can start gentle circular strokes on the outer surfaces of her back teeth, which is where the worst buildup happens in Shih Tzus. Full brushing routine by week two. It sounds slower than it needs to be, but dogs who are introduced properly are far more likely to stay tolerant long-term — and you want this to be a permanent routine, not a battle every time.