Sustain ®

Sustain ®

Sustain is the first product to combine the benefits of two authorised probiotics to help support a healthy digestive and immune system.

Related articles from PetZone


Digestive health

Helps to maintain a healthy gastrointestinal bacterial population

Immune support

Supports immune function both within the gastrointestinal tract and body wide

During environmental or diet changes

These can be associated with disruptions to the healthy intestinal bacteria

Why Should I See My Vet?

At VetPlus we believe vets are best placed to advise the most appropriate course of action for your pet. Poor digestive health can have many different causes and your vet will be able to perform checks to ensure your pet gets the best treatment.

Next Steps

Our products are only available through veterinary practices. To find your closest vet practice stockist, please visit our Vet Search page.

Find my local stockist

What Else Can I Do?

There are a number of measures you can take that can support your dog’s healthy intestinal bacteria and gastrointestinal health:

  • Feeding a veterinary formulation balanced diet
  • Making any changes to the diet gradual, if needed
  • Aiming to reduce environmental stress as much as possible
  • Keeping up to date with routine preventative healthcare provided by your vets


Daily Feeding Guidelines

Sustain comes in sachets which should be given at feeding time, either whole or split between the dog’s daily meals. Lukewarm water can be added to aid mixing.

Sustain can be used in any dog experiencing sub-optimal gastrointestinal health.

Body Weight No. Sachets
Under 20kg 1 small/medium breed sachet
20 - 40kg 1 large breed sachet
Over 40kg 2 large breed sachet


  • Enterococcus faecium – one of only two licensed probiotics for dogs, which has been shown to inhibit the growth of pathogens.
  • Bacillus subtilis – the other probiotic species now licensed for dogs and is unique to SUSTAIN®.
  • MacroGard® – a unique Beta-glucan; which has been found to be beneficial for dogs with IBD and atopic dermatitis as well as improving the immune response to vaccination.
  • Inulin – a fructooligosaccharide prebiotic that encourages production of short chain fatty acids by the microbiota.
  • L-Threonine – important for normal physiology of the gastrointestinal tract.
  • B-vitamins – important for enterocyte and immune cell metabolism.
  • Zinc amino acid chelate – important for energy metabolism, immune cell function and mucosal membrane integrity.

All of our products are manufactured in Lytham, Lancashire to GMP Standard. To find out more about our manufacturing facility, click here.


Contact the vet you purchased Sustain from for guidance on the use of Sustain for your pet. They’ll be able to provide specialised advice for your pet due to the records they keep. If you are unable to get the information you need from your vet, or if you bought Sustain elsewhere, please contact us for assistance.

Featured Products

VetPlus has an innovative and diverse range of products available for your dogs, cats, equestrian and farm animals.

Our leading joint care supplement for dogs

View product
Fibor Tub

The new generation of digestive support with innovative kiwi fruit concentrate and six fibre sources for dogs and cats

View product

Urinaid is a unique formulation to help promote healthy bladders in dogs

View product

A triple action nutritional supplement to help normal digestive function

View product