PetSums is a small, independent UK website of calculators for dog owners, breeders, smallholders, horse owners and outdoor hobbyists. Each tool answers one practical question, such as when puppies are due or how many litres a pond holds, and shows the sums and sources behind the answer.
Who runs it
Rowan Tilby, editor
Rowan Tilby is the pen name of the independent editor who runs PetSums. Rowan writes the pet, smallholding and outdoor tools from vet charity, farming and government sources, and links each figure to where it came from.
Rowan isn't a vet. If an animal is unwell or a birth isn't going to plan, call your vet.
Who checks the tools
Each tool links every figure to the vet charity, farming body or government source it came from, so you can check it. No vet has reviewed the tools yet. If one does, they will be named on the pages they checked, with their registration.
How the site is paid for
PetSums is free to use. We plan to pay for it with advertising and, where they're genuinely useful, affiliate links. Adverts never sit between a calculator and its result, and any affiliate link will be labelled next to the link itself.
What we don't do
We don't give veterinary, legal or financial advice. We don't store what you type into the calculators. We aren't connected to PDSA, the CAA, DEFRA or any other organisation we cite.
Read how we calculate and our editorial policy, or get in touch.