Real-time and accelerated studies that track nutrients, oxidation, microbiology and texture — so your shelf life is set from data.
The date on a pet food pack is a claim that the product will still be safe, palatable and meet its label at the end of that period. Vitamins degrade, fats oxidise, moisture migrates and microbes grow at different rates in different formats.
We design shelf-life studies around the failure modes of your format, combining accelerated conditions for early answers with real-time storage for confirmation, and track the nutrients and quality markers that decide when a product is no longer fit to sell.
Start your project with Guires PNLEach test is chosen for a reason — the stage of development, the format and the rules in your market.
Storage at labelled conditions with scheduled pulls through the full shelf life.
Elevated temperature and humidity for an early indication of stability.
Vitamins, thiamine, taurine and functional actives tracked at each time point.
Peroxide value, anisidine value and rancidity markers for fat-rich products.
Moulds, yeasts and spoilage organisms in moist, soft and fresh formats.
Barrier, moisture uptake and pack interaction across shelf life.
Thiamine keeps falling during storage, so end-of-life values decide overages.
Coated fats and omega-3s oxidise, affecting palatability and nutrition.
Accelerated conditions give early indications but must be confirmed in real time.
Dry, wet, fresh and soft formats fail in different ways and need different markers.
Shelf-life target and failure markers.
Conditions, time points and tests.
Accelerated and real-time storage.
Scheduled testing at each time point.
Results analysed against limits.
Shelf life, overages and storage advice.
Peer-reviewed findings that shape how we design and interpret this work.
Canned cat food lost 17.8% of added thiamine over six months; thiamine deficiency outbreaks have been linked to low-thiamine cat food.
Thiamine measured in finished product and during storage, not only assumed from the formula.
Retorting cut thiamin in canned cat food by 30.4%, whatever the container; time to reach target lethality ranged from 29.5 to 45.6 minutes by pack size.
Vitamins are measured after processing, and heat penetration is studied for each pack format.
Salmonella stayed detectable on dry pet food for 19 months; E. faecium is a conservative surrogate for validating heat steps.
Kill steps are validated with surrogates where needed, and post-process hygiene is part of the transfer package.
Each application has its own page with the evidence, the actives and the claim boundaries we work within.
Helping pets stay healthy for longer.
A healthy skin barrier and a glossy coat, driven by the right balance of omega-6 and omega-3 fatty acids, protein quality and key micronutrients.
Keeping active and ageing pets moving comfortably.
Firm stools, comfortable digestion and a balanced gut microbiome.
Every ingredient we choose for shelf-life & stability testing is assessed for nutrient contribution, digestibility, processing behaviour, palatability and the rules in your market — and sourced to your specification.
Regulation updates, the latest research, recalls and market trends that shape shelf-life & stability testing — written by our formulation, testing and regulatory teams.
Accelerated studies typically run 3–6 months; real-time studies run for the full intended shelf life.
It gives an early indication, but we recommend confirming it with real-time data.
Where needed, palatability can be checked at key time points with partner panels.
Clients in the USA, UK and UAE on working with Guires PNL. Names are withheld at clients’ request.
“Their nutritional and stability testing produced documentation we could present to retailers and regulators. Having that validation in hand made our retail listing process far smoother.”
“As a small brand, independent validation of our nutritional claims was beyond our own resources. They verified our shelf life and nutrient retention and provided the data to back every claim.”
“They tested our formula under the heat and storage conditions of our region and delivered audit-ready reports. We launched knowing the product would perform exactly as specified.”
Real client projects — the problem, the science and the result.
An established Indian pet food brand asked Guires PNL to convert its top-selling adult dry dog food to a clean-label recipe — no artificial preservatives, colours or flavours — with equal palatability, an acceptable shelf life and an unchanged shelf price.
Read the case study →A premium Indian pet food brand’s chicken-and-vegetable wet diet failed three production trials in a row after sterilisation. Guires PNL traced the cause to the formulation, not the retort, and validated a fix the manufacturer could run on its existing line.
Read the case study →Tell us your product, your question and your market — our scientists will come back with a study design and next steps.
Every Guires PNL product is formulated to comply with the FEDIAF Nutritional Guidelines and the AAFCO Dog and Cat Food Nutrient Profiles. Neither body issues certificates to manufacturers, so compliance is verified independently against their published standards — and every product comes with a complete documentation package for regulatory submissions in the EU, US, Australia and Asian markets.
How we verify compliance →