
Healthy movement starts inside the joint
Why joint lubrication matters.
Every turn, landing, retrieve and stride depends on joint surfaces moving smoothly under load. Synovial fluid is part of the natural system that makes that movement possible.
Low friction
Between moving surfaces
Load sharing
Across hydrated cartilage
Cartilage environment
Fluid supports nutrient movement
Normal motion
Through the working stride
Inside a healthy synovial joint
More than oil between two surfaces.
A joint is a living system. Cartilage, synovial fluid and the surrounding capsule work together as the bones move and bear weight.
01 · Articular cartilage
A smooth, hydrated bearing surface.
Cartilage covers the ends of bones within the joint. Its water-rich structure helps distribute load while allowing the surfaces to move with very little friction.
02 · Synovial fluid
The joint’s biological lubricant.
Synovial fluid fills the joint space. Its natural components contribute to low-friction movement between cartilage surfaces.
03 · Synovium and capsule
The environment around the joint.
The capsule encloses the joint, while its synovial lining contributes key components of the fluid bathing the cartilage surfaces.
04 · Nutrient movement
Supporting living cartilage.
Articular cartilage has no direct blood supply. Nutrients and oxygen move into it from the surrounding joint fluid as part of normal tissue maintenance.
Fluid, cartilage and movement work as one system.
Lubrication is not simply about how much fluid is present. The condition of the cartilage, the composition of the fluid and the way the joint is loaded all matter.
What healthy working joints manage
Movement is rarely a straight line.
Working and sporting dogs repeatedly accelerate, stop, turn, land and push through varied ground. Healthy joints continually adapt to those normal changes in direction and load.

Across a normal working day
Control, load and repetition.
Good preparation and sensible management support the joint system across the many different movements a dog may make.
- Progressive warm-up before hard effort
- Conditioning appropriate to the dog and task
- Recovery time between demanding sessions
- Maintaining an appropriate body condition
- Watching for changes in normal movement
The daily foundations
Support the whole system.
No single ingredient replaces the basics. Healthy movement is supported by the dog’s diet, body condition, conditioning, workload and recovery routine working together.
Balanced nutrition
A complete diet provides the everyday nutritional foundation. Complementary feeds sit alongside it rather than replacing it.
Appropriate condition
Maintaining a suitable body condition is part of responsible management for every active dog.
Progressive workload
Build fitness for the job rather than asking an underprepared dog for sudden, repeated hard effort.
Rest and observation
Recovery matters. Notice what is normal for your dog and act when their movement or behaviour changes.
Two pastes · two different jobs
Choose by need—not by colour.
Original is the everyday all-rounder. Joint+ is the more focused collagen formula. Neither is positioned as a medicine, and neither is automatically the right choice for every dog.

Broad everyday support
Maintenance — The Original Paste
A complementary feed for healthy working, sporting, active and older dogs, designed as a broad daily routine.
- Green-lipped mussel
- Salmon, linseed and coconut oils
- Turmeric and rosehip
- Bilberry, spinach and kale

Focused nutritional building blocks
Joint+
Collagen matters. But joint support is about more than collagen alone.
A targeted complementary feed for maintaining healthy joints and connective structures in dogs facing regular physical demands.
- Bovine collagen peptides Type I & III
- Green-lipped mussel
- Boswellia serrata
- Rosehip and turmeric
- Salmon oil, linseed oil and coconut oil
An important distinction
The paste does not physically oil the joint.
A dog’s body produces and regulates its own synovial fluid. FieldStrength pastes provide nutritional ingredients within a complementary feed; we do not claim that they add lubricant to the joint, increase synovial fluid, rebuild cartilage or repair an injury.
Made by us. Explained honestly.
Know when nutrition is not the answer
A change in movement needs attention.
This page is about maintaining normal health in healthy dogs. Lameness, pain, swelling, reluctance to bear weight or a sudden change in movement should be assessed by a veterinary professional. A complementary feed does not replace diagnosis, treatment, prescribed medication or rehabilitation.
Support their normal working life
Start with the dog in front of you.
Compare Original and Joint+ by age, workload and normal routine—or ask Phil if you are unsure which formula fits.
