As pets get older, they may gradually lose a couple of pounds. However, if you notice any sudden or significant weight changes in your dog, it’s important to speak to your vet to identify the cause.
Weight loss coupled with a good or even increased appetite can be a sign of hyperthyroidism (an overactive thyroid gland), although this is a condition that is more common in cats. If you do notice these symptoms, give your vet a call straight away. While a good recovery is possible through treatments such as surgery or medication, the condition can cause complications and organ damage if it’s not addressed early enough.
Other causes of rapid weight loss may be due to a parasite, or kidney or liver disease – so it’s best to book a check-up as soon as you can. But keep in mind that weight loss could also be due to something that is quite easily treated, such as a short-lived infection.