How nutrition supports healthy muscle condition in dogs and cats

Not every pet is a dedicated athlete – some consider the sprint to the food bowl quite enough. But healthy muscle isn’t just about athletic performance. It helps pets walk, play, eat, breathe and hold themselves upright.

When muscle is lost, everyday movement can become harder, affecting a pet’s strength, mobility and quality of life. Healthy muscle needs more than protein. Amino acids, energy, fats, vitamins, minerals, digestibility and the overall balance of the complete diet all matter. As does exercise and overall health.  

This guide explains why dogs and cats lose muscle, how to spot changes in muscle condition and how nutrition, veterinary care and appropriate activity can help maintain it throughout their life.

Why do pets lose muscle?

Muscle loss isn’t a diagnosis in itself, it is a sign that something has changed. Possible causes include:

• Reduced activity
• Inadequate nutrition
• Poor digestion or nutrient absorption
• Ageing
• Chronic inflammatory or systemic illnesses
• Muscle disorders
• Some medication side effects

How to assess your pet’s muscle condition

Muscle condition is different from body condition. Body condition looks at fat stores, while muscle condition considers the amount and shape of the muscle itself. A pet can appear to be a healthy weight, or even overweight, while losing muscle beneath body fat. 

Areas to pay attention to when assessing your pet's muscle condition include: 

• The temples on either side of the head  
• Around the shoulder blades  
• Along the spine, particularly the lower back  
• Around the pelvis and hips  

At home, when your pet is happy and healthy, familiarise yourself with what their usual muscle shape feels like. A thick or fluffy coat can hide more than it reveals, so use your hands as well as your eyes. Gently feel these areas while your pet is relaxed and standing evenly. 

Look for areas that seem flatter or more sunken than before, bones that are becoming more prominent, or a noticeable difference between the two sides of the body. Taking an occasional photo from above and from the side can also make gradual changes easier to spot over time

What to do if your pet has lost muscle

Because several causes can look similar from the outside, any new or progressive muscle loss should be assessed by your veterinarian.

If you notice a change in their shape, increasing weakness, difficulty moving or a difference between the two sides of their body, arrange an appointment with your vet.

How to support healthy muscle condition in dogs and cats 

There’s no one-size-fits-all plan for maintaining or rebuilding muscle. Supporting healthy muscle takes three things working together:

1. Complete and balanced nutrition
2. Regular and appropriate movement
3. Veterinary care when muscle condition changes

Consider if your pet’s on the right diet that meets their needs

Muscle tissue is maintained and repaired requires amino acids. Some amino acids are considered essential because dogs and cats can’t produce enough of them themselves and must obtain them from proteins in their food.

“High Protein” diets are not necessarily the answer

A food labelled “high protein” or displaying a high meat percentage isn’t automatically the best choice, as protein levels are only part of the picture. The amount and balance of amino acids, quality and digestibility, and overall suitability of the complete recipe all matter.

Pets with specific health conditions may have specific protein and nutritional requirements, so speak with your vet before switching diets.

The whole diet matters

In addition to amino acids, pets also need the right balance of energy, fats, vitamins, minerals and other nutrients to maintain their overall health and muscle condition. In other words, muscle support comes from the whole diet—not one impressive-looking number on the label.

For most healthy pets, the best diet is generally a complete and balanced food suited to their species, life stage, and breed size, fed in an appropriate amount that they enjoy to eat. These diets will provide all the nutrients they need.

Don’t neglect exercise and conditioning

Pumping iron at the gym isn’t necessary for pets. Muscles are maintained by being used, so regular movement plays an important role alongside appropriate nutrition and veterinary care.

For a healthy dog, this might include walks, active play and exploring different environments. Cats can stay active through climbing, chasing, pouncing, interactive toys and food puzzles. The right activities will depend on your pet’s age, health, fitness and individual preferences.

More isn’t always better: a sudden increase can cause soreness or injury, while pets recovering from illness, injury or surgery may need particular movements restricted.

The key is to build activity gradually. Start from your pet’s current ability and build duration and intensity up from there. Activities like swimming can be a great, low-impact way to encourage a pet to use their muscles in those pets who are not yet up for energetic play. Physiotherapy exercises can also help.

Address the underlying cause of muscle loss

If pain, illness, injury or another medical condition is contributing to muscle loss, changing food or increasing exercise alone is unlikely to solve the problem. Muscle loss may continue unless the underlying cause is treated or appropriately managed.

Your vet can assess your pet’s overall health, review their diet and activity, investigate the cause of the muscle loss and recommend an appropriate treatment or management plan.

Strong muscles support more feel-good moments

Healthy muscle helps pets do more of what makes life feel good. Support your pet with complete and balanced nutrition suited to their individual needs, regular and appropriate movement, and regular veterinary care.

When the food your pet loves provides the strength and energy to move, play and make the most of everyday life, that’s the feed good feeling in action.

Explore complete and balanced dog and cat food at Petbarn, in store or online.