This was purchased for a small dog (around 7kg). The chunks are a little big for him - it's a chew which lasts an hour at least, rather than a training treat. No sign of it causing a tummy upset. But the main problem is the smell - it's the worst smelling dog food item I've found so far (the smell is strong enough to linger in your nostrils for a few hours even when you're not around the product). The dog has to eat it in the garden when he wants to eat it. Realistically I will not be purchasing this again.