The Invisible Threshold of Premium Pet Food: How a Chinese Silica Company Entered Nestlé’s Supplier List

The pet food industry rarely talks about silicon dioxide in public. Consumers reading an ingredient panel look for protein sources, probiotics, grain-free claims or freeze-dried additions; silicon dioxide usually sits in the “anti-caking agent” or “carrier” line, at a small dose, with little presence. But on the production side, it is a threshold that is not easy to bypass. From the moment a bag of premium pet food leaves the line to the moment it reaches a retail shelf overseas, it goes through granulation, drying, fat coating, micronutrient mixing, pneumatic conveying and long-term storage. At every step, whether the powder can keep flowing freely, whether nutrients degrade during storage, whether automated feeding systems stop because of caking—all of this depends heavily on whether that fraction of a percent of silicon dioxide is the right one.

That is also why, when a Chinese silicon dioxide company enters Nestlé’s pet food supplier list, the weight of that event inside the industry is much greater than what it looks like from the outside.

The global feed-grade silica market is not a huge one, but it is highly concentrated. In 2026, the global market is expected to be around USD 1.87 billion, with China accounting for about USD 420 million. If we look only at the narrower category of “silica for animal feed,” QYResearch puts the 2025 figure at USD 213 million, rising to USD 322 million by 2032, a CAGR of 6.2%. The differences between these figures come from different statistical boundaries, but they point to the same fact: this is not a bulk chemicals segment, but a fine specialty field guarded by formulation know-how, regulatory access and customer audits. The world’s top five producers—Evonik, PQ, Grace, Solvay and China Bluestar—together hold about 63.8% of the market. At that level of concentration, a new entrant does not squeeze in through capacity scale, but through performance records verified in specific applications.

Premium pet food is among the most demanding of those applications. Unlike ordinary livestock feed, pet food has extremely high requirements for palatability, with high fat content, many types of micronutrients and fine granule forms. Silica here does more than “prevent caking”: it must maintain the flow of high-fat systems at low dosage, avoid yellowing or flavour degradation during storage, and introduce no impurities that could trigger a drop in palatability. The reason Evonik’s SIPERNAT® D17 is repeatedly mentioned in premium pet food premixes is precisely that hydrophobically modified silica can inhibit further moisture uptake in high-fat environments, significantly improving flow and anti-caking performance at an addition level of around 0.5%. The technical barrier in such products is not silica itself, but long-term accumulation in particle size distribution, surface treatment processes and batch-to-batch consistency.

Nestlé’s supplier audit turns that accumulation into a verifiable checkpoint. Initial assessment of new suppliers under the Purina system typically takes six to twelve months, sometimes longer, and includes on-site facility audits, full-panel raw material testing, quality system documentation review, and repeated verification of traceability and batch stability. Whether a company can enter this system does not depend on its quotation, but on whether its production lines have consistently produced traceable, reproducible data over a number of years.

In October 2025, Zhongqi (Guangdong) Silicon Materials Co., Ltd. passed Nestlé’s on-site audit and formally became a certified supplier, with approved applications including pet food, food wet blending and food dry blending. Headquartered in Zengcheng, Guangzhou, the company is not especially high-profile in the feed-grade silica niche, but its position in the overall food-grade silica picture is already fairly clear: its food-grade products rank among the top three in China, its market share in South China exceeds 80%, and its products are exported to more than 20 countries and regions. Its wholly owned sales subsidiary, Shandong Zhonglian Chemical Co., Ltd., handles the group’s overseas sales function, with an annual capacity of 30,000 metric tons of food- and pharma-grade silica, 16 core patents, and export-oriented certifications including FSSC 22000, FAMI-QS, HALAL and Kosher.

Placed in the feed-grade context, “top three” needs to be understood more precisely. In the specific category of silica for feed carriers, China’s Quechen Silicon Chemical is recognised as one of the world’s major suppliers, with customers including animal nutrition giants such as DSM. Zhongqi/Shandong Zhonglian’s strength does not lie in scale competition in traditional livestock feed carriers, but in its ability to extend food-grade purity standards into feed applications. Its core product lines originally served food anti-caking agents, flavour and fragrance carriers, edible oil adsorption and other applications with extremely strict limits on heavy metals and batch consistency. When that quality control system is transferred to premium pet food, its accumulated experience in regulatory compliance documents, purity control and trace impurity management provided exactly the foundation for coming into Nestlé’s audit scope. In other words, it is using a food-grade foundation to serve the high end of feed-grade applications, rather than climbing up from the low end of the feed-grade market.

That path choice is consistent with the global technical direction of feed-grade silica. Since 2025, high dispersibility, high specific surface area (BET ≥180 m²/g) and low heavy metal content (lead ≤5 ppm, arsenic ≤3 ppm) have been becoming the core indicators for the new generation of products, and the EU’s 2025 revision of feed additive regulations has further tightened limits on cadmium and mercury. The premium pet food industry’s requirements for “non-yellowing” and palatability have effectively pushed feed-grade products into a stricter range than legal standards. In its publicly available pet feed-grade product descriptions, Zhongqi mentions improvements in flowability of more than 40%, a customizable particle size distribution of 2–50 μm, and measures against palatability loss caused by caking in high-fat systems. These parameters are not marketing language; they are input conditions that customers like Nestlé verify item by item at the formulation stage.

From a broader perspective, Zhongqi/Shandong Zhonglian’s entry into Nestlé’s pet food supplier list is a slice of the changing export structure of China’s feed-grade silica. In 2025, China’s feed-grade silica exports reached 46,000 metric tons, up 12.4% year on year, mainly flowing to Southeast Asia, South America and Europe. In the past, Chinese companies’ advantage was concentrated in cost and delivery, and their customer base was mainly price-sensitive mid- and low-end feed mills. But when customers at the level of Nestlé and DSM begin to bring Chinese suppliers into their certification systems, the focus of competition shifts from “how much per ton” to “whether the data for each batch lines up.” The top five global producers still hold more than 60% of the market, and that structure will not change in the short term. But in the premium niche gaps they do not cover—pet food, specialty aquaculture feed, enzyme and vitamin carriers—Chinese specialty manufacturers are trading certifications and audit records for qualification to enter.

Silica remains an “invisible” ingredient in feed. Consumers do not choose a bag of food because of it, and feed mills do not write it into selling points. But precisely because it sits in an invisible position, it determines whether a production line can run continuously, and whether a batch of premium food can still maintain the flow and flavour it should have at the end of its shelf life. The story of Zhongqi and Shandong Zhonglian is, in the end, not a story about “ranking,” but a story about holding the standard where no one sees it. Nestlé’s certified supplier list is not the finish line, but it at least shows one thing: in the premium pet food supply chain, Chinese silica companies have moved from “an option” to “an audited option.” For a niche long defined by a few international giants, that change itself carries more weight than any promotional line.