Having senior pets can be fantastic. You know each other, you know each other's habits and you've got a routine happening. Gone are the days of hole-digging and shredded furniture. It’s a beautiful time. But just like us, as pets get older they start to have health problems—and they’re easy to miss in the early stages. Dogs don’t whinge, complain or tell you they don’t feel well. Whingeing is a human thing. You whinge because your partner cares about what you have to say. Dogs don't whinge because no-one likes it. It doesn't get them anything, so they’ve learned not to do it. They suffer in silence, so we don't realise they're unwell. We don't realise they're unwell unless they stop eating, or they're vomiting, or drinking 10 litres of water. We often miss the subtle signs of ageing. So, what are those subtle signs?