California AG and FTC File Lawsuit to Block $3.5 Billion Veterinary Supply Acquisition

On November 12, 2026, California Attorney General Rob Bonta joined the Federal Trade Commission and a coalition of 21 state attorneys general to file a lawsuit blocking a proposed corporate acquisition in the animal health industry. The legal action targets Covetrus, Inc.’s proposed $3.5 billion purchase of MWI Animal Health from Cencora, Inc.

The lawsuit was filed in the U.S. District Court for the Southern District of New York. Government regulators argue that combining Covetrus and MWI—the two largest veterinary supply distributors in the United States—would severely reduce market competition, driving up costs for veterinary practices and pet owners.

Challenging the Acquisition Under Federal Antitrust Law

The lawsuit alleges that the proposed transaction violates Section 7 of the Clayton Act. This federal antitrust law prohibits corporate mergers and acquisitions that may substantially lessen competition or tend to create a monopoly. Antitrust laws exist to preserve open market competition so dominant corporations cannot arbitrarily control prices or unfairly squeeze buyers.

In the United States, the vast majority of essential veterinary supplies—including prescription medications, vaccines, and medical equipment—are distributed through just three national suppliers: Covetrus, MWI, and Patterson Veterinary. On March 18, 2026, Covetrus entered into an agreement to acquire MWI from Cencora for approximately $3.5 billion. A joint government investigation revealed that Covetrus and MWI currently compete directly every day through price matching, volume-based drug rebates, and service contract negotiations.

Rising Pet Care Costs and Supply Chain Disruption Risks

The legal challenge comes during a period of growing financial pressure for pet owners. According to the California Attorney General’s office, veterinary care costs have increased roughly 60% since 2014, with prices rising an additional 5.7% from August 2025 to August 2026.

Beyond direct price increases, government investigators determined that the merger threatens the reliability of the veterinary supply chain. Veterinary practices currently rely on multiple distributors to manage product shortages and delivery disruptions. If one supplier experiences a shortage of a critical vaccine or prescription medication, clinics turn to another distributor to maintain continuous patient care. Merging Covetrus and MWI would eliminate this vital safeguard, increasing the risk of product shortages, reduced delivery schedules, and diminished service quality. Smaller regional and specialty distributors lack the scale to constrain the combined company’s market power.

What This Antitrust Lawsuit Means for Clinics and Pet Owners

For veterinary clinic owners and pet families, the lawsuit aims to maintain competitive options in the market. If the federal court blocks the deal, veterinary practices will keep access to multiple competing distributors, helping prevent forced wholesale cost increases on essential medicines and equipment.

Pet owners are directly affected because clinics often must pass higher inventory costs down to consumer bills. Attorney General Bonta highlighted this burden, noting,

“California families are already facing rising costs, and the last thing they need is a corporate merger that threatens to make essential veterinary care even more expensive.”

Preserving competition among distributors helps keep everyday care and prescription animal medications more accessible.

When Commercial Law and Merger Regulations Matter

Business owners and healthcare practice operators navigating major supplier consolidations, vendor contract disputes, or federal antitrust enforcement issues can benefit from consulting a corporate attorney. A lawyer knowledgeable in commercial agreements can help businesses evaluate distribution contracts and understand how industry mergers impact their operations.

This article is general information based on California Attorney General and court or agency records available at publication time. It is not legal advice; laws and deadlines differ by state and by case. Published November 13, 2026.