Senior Basenji food in a multi-dog home

Juggling three different foods in one household is genuinely hard work — and it tells me you're already thinking carefully about each dog as an individual, which matters. Senior dogs really do have different nutritional needs: fewer calories to avoid weight gain, easier-to-digest protein so their gut isn't working overtime, and more joint support as cartilage starts to wear. But exactly what a senior dog needs depends a lot on breed and health history. To point you toward the right food for your Basenji specifically: how old is she or he, are there any health conditions in the picture — things like kidney function, weight issues, or joint stiffness — and what are they currently eating?

That makes a lot of sense — and honestly, sharing a standard adult kibble with a younger dog is one of the most common reasons senior dogs quietly gain weight. Adult formulas are calorie-dense in a way that suits a dog with a full day of activity ahead of them, but an 11-year-old Basenji who's slowed down just doesn't need that fuel load. Basenjis are lean by nature, so even a small amount of extra weight puts disproportionate pressure on their joints and can affect their energy. A few more questions before I give you a specific recommendation: is he still eating enthusiastically, or has his appetite dropped off at all? And is he free-fed alongside the other dogs, or do you feed separately?

Good — a healthy appetite at 11 is a positive sign, and supervised separate feeding means you can actually control portions properly, which is half the battle with weight management. Given what you've described — an 11-year-old Basenji, weight creeping up, no diagnosed conditions but slowing down — I'd recommend Hill's Science Plan Mature Adult 7+ Small & Mini with Chicken. I know Basenjis aren't classified as a small breed exactly, but they're a lean, light dog around 10–12kg, and the small breed senior formula is genuinely better suited to them than a large-breed senior: the kibble size fits their jaw, the calorie density is controlled without being so low it leaves him unsatisfied, and it has L-carnitine to help with fat metabolism plus added glucosamine and chondroitin for joint support. It's also highly digestible, so you're not asking an ageing gut to work harder than it needs to. One bag, clearly his, and it addresses the exact issues your vet flagged.

It can, yes — any food switch has that risk, but it's very manageable. Do a gradual transition over 7 to 10 days: start with about 25% new food mixed into 75% of what he's currently eating, then shift to 50/50 around day four, then 75% new by day seven, and full switch by day ten. Because Hill's Mature Adult 7+ is more digestible than a standard adult kibble, most dogs actually settle onto it without trouble — but the slow transition removes the guesswork. If you notice loose stools at any point, just hold at that ratio for an extra couple of days before moving forward. Given his appetite is good and there's no underlying gut sensitivity, I'd expect the switch to go smoothly.

Exactly the right call — start with the 1.5kg or 3kg bag, see how he takes to it and how his digestion handles it over a couple of weeks, then move to a larger size once you're confident. Given his weight concern, also worth measuring portions precisely using the guide on the pack rather than eyeballing it — that's often where senior dogs quietly get overfed even on the right food. Good luck with him; an 11-year-old Basenji with a good appetite and an owner paying this much attention is in a solid position.