Switching a Whippet to Adult Food at 1 Year

A one-year-old Whippet hitting that puppy-to-adult transition is actually a really common point of confusion — Whippets are lean, sensitive dogs and getting the food change right matters more than people realise. The timing is right around now, but how you do it is just as important as what you switch to. To point you toward the best option: is your Whippet male or female, roughly what weight, and have you noticed any digestive sensitivity or skin issues? And what are you currently feeding?

That's helpful — 11kg is spot on for a female Whippet, and that mild digestive sensitivity is really common in the breed. It tells me you want a food with a clean, limited ingredient profile and a single, high-quality protein source rather than anything complex or highly processed. Royal Canin Whippet Junior has done its job, but it's quite starchy and the ingredient quality isn't as high as it could be. For an adult Whippet with a sensitive stomach, I'd move her onto Millie's Wolfheart Countryside Mix — it's a cold-pressed dry food with a simple recipe built around chicken, turkey, and vegetables, no red meat, no artificial additives, and a very consistent response in dogs with sensitive digestion. It's also lower in calories than many foods which suits the Whippet's lean physique. Do it as a gradual swap over 10 to 14 days — start with 25% new food mixed with 75% current food, and shift the ratio slowly. Watch her stools and energy levels as you go.

Puppy food is calorie-dense by design to support growth, so adult portions generally look smaller by volume even if the caloric content is similar. For an 11kg Whippet on Millie's Wolfheart Countryside Mix, the feeding guide puts her at roughly 175–195g per day, split into two meals. That said, Whippets are one of those breeds where you should feed to the dog rather than strictly to the packet — you want to be able to feel her ribs easily without pressing hard, and see a slight waist when looking down at her. If she starts looking ribby or gains a rounder belly, adjust by 10–15g either way. The cold-pressed format also means the kibble expands a little in the stomach, so dogs often feel more satisfied on it than the gram count suggests.

Just focus on the food switch for now — doing one thing at a time is the right instinct. Once she's settled on the adult food, usually after three or four weeks, you could think about adding a fish oil supplement like Yumega Plus if her coat ever looks dull or her skin gets flaky in winter. Whippets can be prone to that. But honestly, if she transitions cleanly and her digestion stays stable, you're in a good place. No need to overcomplicate it.