When to Switch Your Puppy to Adult Dog Food — A Breed by Breed Guide

Switching your puppy to adult dog food is one of the most important dietary changes you’ll make as a dog owner. Get it right and it’s seamless. Get it wrong — too early, too late or too abruptly — and you risk disrupting your dog’s growth or digestive health. Here’s what you need to know.

Why Puppy Food and Adult Food Are Different

Puppies have significantly different nutritional requirements to adult dogs — more protein for muscle development, more calcium and phosphorus for bone growth, DHA for brain and eye development. Our Premium Puppy Food is formulated to meet all of these elevated requirements, with DHA from marine algae and a dual prebiotic blend for gut health development.

When to Switch: The Right Age by Breed Size

• Small breeds (under 10kg) — ready to switch at 9–12 months

• Medium breeds (10–25kg) — switch at around 12 months

• Large breeds (25–45kg) — wait until 15–18 months

• Giant breeds (over 45kg) — wait until 18–24 months

How to Make the Switch Safely

Use the same gradual 7-day transition approach recommended for any food change: 75/25 for days 1–2, 50/50 for days 3–4, 25/75 for days 5–6, then 100% adult food from day 7. For large breeds or sensitive dogs, extend to 10–14 days.

Which Adult Food to Choose

All Growing Paws adult dry food recipes are wheat-gluten free and include joint care as standard. Our Chicken & Rice is the most popular everyday choice. For dogs with sensitivities, Salmon & Potato (grain free) is the most targeted option. Our cold pressed range is also suitable for adult dogs and popular with those moving on from raw feeding. Not sure which to choose? Contact us — we’re happy to help.

Frequently Asked Questions

Can I feed my puppy adult dog food before 12 months? Generally no. Puppies under 12 months have specific nutritional needs that adult food doesn’t fully meet. For large breeds particularly, switching too early can affect bone and joint development.

Should I switch to a different protein when moving to adult food? Not necessarily, but it’s worth considering. If your puppy has been on chicken for a year, rotating to lamb or salmon helps prevent them developing a sensitivity to chicken over time.

All Growing Paws adult recipes available in 2kg trial bags — delivered throughout Northern Ireland from our base in Comber, Co. Down.