Why Your Dog or Cat Might Be Losing Weight

Noticed your pet looking a little slimmer lately?

Weight changes can happen for many reasons – some harmless, others worth paying attention to. Because dogs and cats can’t tell us when something feels off, unexpected weight loss is often one of the first signs that something might need a closer look.

Here are some common reasons why your pet may be losing weight.

1. Changes in Diet or Appetite

One of the simplest explanations is a change in what (or how much) your pet is eating.

Pets may lose weight if:

  • Their food was recently changed
  • They don’t enjoy the flavour of a new diet
  • Feeding portions are too small
  • Another pet in the home is eating their food

Cats in particular can become picky eaters, while dogs may lose appetite if they feel stressed or unwell.

2. Increased Activity

If your pet is suddenly getting more exercise, weight loss can follow.

For example:

  • More walks or play sessions
  • A move to a home with a larger garden
  • A younger, energetic pet joining the household

Just like people, pets burn more calories when they’re more active. However, the weight loss should be gradual and not excessive.

3. Parasites

Internal parasites such as worms can prevent pets from absorbing nutrients properly.

Signs to watch for include:

  • Weight loss despite normal eating
  • A dull coat
  • Diarrhoea or vomiting
  • A swollen belly (especially in puppies or kittens)

Regular deworming is an important part of preventative care.

4. Stress or Routine Changes

Pets are sensitive to environmental changes.

Events like:

  • Moving house
  • A new baby or pet
  • Changes in your daily routine

Can affect appetite, particularly in cats. Some pets eat less when they feel unsettled.

5. Underlying Health Issues

Sometimes weight loss can signal a medical condition. Certain illnesses may affect digestion, metabolism or appetite. Conditions such as dental problems, infections, thyroid issues or chronic disease can all contribute to weight loss.

 

What Should You Do?

If you notice weight loss:

  • Check feeding portions
  • Monitor eating habits
  • Keep track of any new symptoms
  • Weigh your pet regularly if possible

Small changes may resolve on their own, but ongoing weight loss should always be taken seriously.

 

Want to ask the Pets24 AI Vet a question about your pet’s health, behaviour or daily care?

Ask here: https://pets24.co.za/ai-vet-advisor/

In an emergency situation though, the AI Vet will always recommend that you consult your local veterinarian first.

The post Why Your Dog or Cat Might Be Losing Weight first appeared on Pets24.



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