When a dog keeps munching grass and bringing it back up, the question that matters is "is this just a quirky habit, or is his stomach upset - and is it happening more often?" PetHealthLog lets you log each episode with a time stamp, note how much grass and whether vomiting followed, record what came up and how the appetite and energy look alongside, and watch the trend - so you can tell an occasional nibble from a real change. Free, no account, works offline.
Start tracking - it's freeRepeated vomiting can dehydrate a dog quickly, and a few signs need attention rather than a log. If your dog vomits again and again or cannot keep water down, retches without bringing anything up while the belly looks bloated or tight, has blood in the vomit, seems weak, collapsed or in pain, or is gulping grass frantically and unable to settle, this is not a watch-and-wait situation - contact your vet or an emergency clinic now. This tracker is for keeping a record, not for delaying care when a dog looks unwell.
Veterinary sources describe grass eating as a common, usually harmless behaviour. Most dogs that eat grass are not unwell beforehand, and only a minority actually vomit afterwards - often because the long blades tickle the throat and stomach rather than as a deliberate attempt to be sick. The habit is sometimes linked to a need for fibre, to boredom or anxiety, or simply to liking the taste and texture.
What changes the picture is a change. A dog that suddenly starts eating grass far more than usual, eats it frantically, or begins vomiting after grass it used to tolerate is showing something worth noticing. Repeated vomiting, or grass eating alongside a drop in appetite, loose stools or low energy, can point to an upset stomach, reflux, parasites or another digestive problem - and that is hard to judge from a vague memory of "he's been doing it a bit lately."
PetHealthLog is free, asks for no account and works offline, so each time it happens you can log the episode, whether vomiting followed and what else you see. The trend is right there, the change is visible, and you have a real record instead of a guess when you call the vet.
A log only helps if it is quick to fill in the moment it happens and turns scattered episodes into something you can read. Here is how PetHealthLog handles both.
Note when your dog ate grass, roughly how much, and whether it was a calm nibble or a frantic gulp - each entry lands on the timeline with the date. Over days you can see whether it is occasional or building.
Mark whether your dog threw up afterwards, how soon, and what it looked like - mostly grass and froth, undigested food, or something else. "He ate grass and was fine" reads very differently from "grass, then vomited three times," and both are useful to a vet.
Grass eating rarely tells the whole story on its own. Add a quick note on whether your dog is eating normally, seems bright or flat, and how the stools look, so a pattern is easy to spot.
The timeline makes the trend obvious - a steady once-a-week habit reads differently from daily episodes that are creeping up. Seeing it laid out helps you judge when it has moved from quirk to change.
Export a clean PDF of the entries, their dates, whether vomiting followed and the notes alongside. If you do end up at the clinic, the conversation starts from a real timeline instead of "he's been eating grass and throwing up on and off, I think."
General guidance from veterinary sources - when in doubt, call. The tracker helps you spot these, it does not decide them.
When a vet has ruled out anything serious, owners of dogs that nibble grass out of habit or for fibre often keep a few gentle basics on hand: a dog-safe grass or pet-grass growing kit so a dog can graze on something clean rather than treated lawn, a slow-feeder or puzzle toy to ease boredom-driven chewing, and a vet-recommended fibre-rich dog food or topper. None of these treat an upset stomach, parasites or any underlying cause, and none replace a vet exam or any prescribed treatment - they just help with everyday routine while the vet handles the cause. Never give human anti-nausea medication to a dog unless a vet tells you to.
These search links show popular options on Amazon. They are everyday extras - whether your dog's grass eating and vomiting needs treatment is a question for your vet.
Pet grass kits → Slow feeders → Fibre toppers →#ad - affiliate links: as an Amazon Associate, PetHealthLog may earn from qualifying purchases at no extra cost to you. Informational only, not veterinary advice.
Grass eating and the odd vomit happen at the worst moments - mid-walk, in the garden before work, last thing at night. The last thing that should stand between you and noting it down is a login screen or a spinning loader.
PetHealthLog stores everything locally on your device. There is no account to create, nothing is uploaded to a server, and there is no tracking. It opens instantly, lets you log an episode or check the trend whether or not you are online, and keeps the data yours. You can export a backup any time and restore it on another phone.
Free, offline, and ready the moment you open it.
Start with PetHealthLogIf your dog swallowed a toy, sock or unknown object, keep a clear record of what and when while you and your vet decide.
When the upset stomach takes over, switch to logging each vomit and loose stool and watch for dehydration signs.
If your dog goes off food alongside the grass eating, track meals offered and eaten to see how much is going down.
For a dog on a vet-advised gut routine, log probiotics, stool quality and how the digestion is settling.
If a vet has diagnosed pancreatitis, log low-fat meals, flare-ups and recovery to keep the diet on track.