What does exist is a sound method, and a set of variables that actually determine the answer for your dog. This page covers both, and tells you where your vet has to replace it.
For the wider picture, start with the dog guide.
Weight is the starting point, not the answer
Weight matters. A Chihuahua and a Great Dane are not on the same amount, and a product that says “a few drops” without reference to body size is not a product you can dose from.
But weight alone gets you a rough bracket, not a number. Four other things move it.
What you are addressing. A dog you are supporting through a fortnight of building work is a different case from an elderly dog with an ongoing mobility problem.
Other medications. The most important one. CBD is processed in the liver by enzyme pathways that also handle a large share of common drugs. In a dog on long-term medication, that is a live consideration.
→Read nextCBD and your dog’s medications
Age and organ function. An older dog with reduced liver or kidney function handles anything differently from a healthy adult.
Body condition, not just body weight. An overweight dog and a lean dog of the same weight are not identical, and this is a question worth putting to your vet rather than resolving with arithmetic.
This is the point where your vet is genuinely useful and a website is not. Someone with your dog’s weight, bloodwork and medication list in front of them can give you a starting figure. Nobody writing a blog post can.
Start low, go slow: the actual method
Step one. Get a starting amount from your vet, or from the product label.
Proof Pets CBD Drops contain 300mg of CBD per bottle. Follow the label for the starting amount and check it with your vet before the first dose, particularly if your dog takes any medication.
Proof's Pet Drops label recommends starting with 1-2 drops (1-2 mg) for pets under 10 lbs, 0.25-0.5 mL (5-10 mg) for 10-30 lbs, 0.5-1 mL (10-20 mg) for 30-60 lbs, and 1-1.5 mL (20-30 mg) for pets over 60 lbs.
Step two. Give the same amount at the same time for several days.
Not one dose, then a larger one the next evening because nothing obvious happened. Consistency is what makes step three possible.
Step three. Write down what you see.
Three or four specific, countable things. Whether the dog gets up from lying down without hesitating. Whether they manage the stairs. How they settle in the evening. How much they eat. Specific and countable beats “seems better,” because you want it to work and your memory is not neutral.
Step four. Adjust once, if at all, and only after several days.
If you change the amount, the timing and the product in the same week, you will not know which one did anything.
What to check on a label so you can dose at all
You cannot dose what you cannot calculate.
| What to look for | Why it matters |
|---|---|
| Total CBD in the bottle, in mg | The only way to work out what an amount contains |
| Bottle volume in mL | Lets you calculate concentration rather than guess |
| A graduated dropper | A dropper with markings is measurable. One without is not |
| Explicit THC-free statement | Not “hemp-derived,” which says nothing about THC |
| A current certificate of analysis | Confirms the number on the label is the number in the bottle |
What should worry you: a product with no total, or one whose only guidance is “a few drops.” Proof publishes Test results precisely so the number on the label can be checked.
Why the human bottle in the cupboard is not the answer
Two reasons.
Concentration. A human tincture is built for an adult human body, and working a dog’s amount out of one is a calculation people get wrong in the direction that matters.
Xylitol. Some human products, particularly flavoured ones, use xylitol as a sweetener, and xylitol is dangerous to dogs. That single fact is enough on its own.
→Read nextCan I give my dog human CBD oil?
The delivery problem that undoes careful measuring
If you mix drops into a full bowl of food, you only know the dose was delivered if the bowl is finished.
A dog that leaves a third has had an unknown amount. This matters less with dogs than with cats, because most dogs finish the bowl, but it matters for fussy eaters and for multi-dog households where bowls get swapped.
The fix is a small portion you can watch disappear, or a treat you hand over directly.
→Read nextHow to give a dog CBD oil
More is not better
Effects owners report as unwanted, particularly drowsiness, softer stools and appetite change, are generally dose-related. If a sensible amount has produced nothing after a fair trial, escalating on your own judgement is the wrong move. Ask your vet, or accept that it is not doing much for this dog.
Stop and call your vet if you see vomiting or diarrhoea that does not settle, a marked change in appetite or drinking, unusual lethargy, wobbliness or disorientation.
→Read nextIs CBD safe for dogs?
The short version
The short version
- There is no established veterinary dosing standard for CBD in dogs.
- Weight gives you a bracket. Medication, age, organ function and body condition move it.
- Start from the label, confirm with your vet, then start low and hold steady for several days.
- Write down three or four specific things before you start.
- Do not use a human product. Concentration and xylitol.
- More is not better, and escalating to chase an absent effect is the wrong move.