Pyrenean Mastiff Weight & Calorie Guide

The Pyrenean Mastiff is a massive Spanish livestock guardian breed, bred for centuries to protect flocks from wolves and bears in the Pyrenees mountains. They are calm, dignified giants with a thick white coat marked with patches of color. Their enormous frame is inherently prone to hip and elbow dysplasia, and excess weight accelerates joint deterioration to a devastating degree. As a giant breed, they face significant bloat risk and are susceptible to heart disease. Their size means that even minor health issues become major when complicated by obesity.

Exercise: Pyrenean Mastiffs need 45–60 minutes of daily moderate exercise — long walks and supervised yard time. They are not high-energy dogs but need consistent movement to maintain muscle mass and joint health. Puppies must avoid high-impact exercise until growth plates close, typically around 18–24 months. They are calm indoors but appreciate having space to patrol.

Feeding tips: Feed a large-breed formula in two to three measured meals daily. A Pyrenean Mastiff eats 6–10 cups of dry food per day — precision is critical. Use slow-feed bowls and avoid exercise for 90 minutes around meals to reduce bloat risk. Supplement with glucosamine and chondroitin for joint support. Never free-feed a giant breed.

Keeping your Pyrenean Mastiff at a healthy 120–180 lbs (55–80 kg) is essential for their joints, heart, and overall well-being. Use PawScale's calorie calculator for Pyrenean Mastiffs to set exact daily limits, check body condition with our BCS assessment tool, and build a balanced meal plan with the feeding guide.