Illinois will let courts weigh a pet's well-being when the owners never married.

The new Illinois statute puts companion animal disputes into the replevin article, and ownership papers alone will not decide who keeps the animal. Public Act 104-0613 allows a court to consider the animal's well-being in a possession dispute between people who were never married. It takes effect January 1, 2027.

The new remedy remains an ordinary replevin action

Section 10 of the Act amends 735 ILCS 5/19-101 and adds 735 ILCS 5/19-106.5 and 735 ILCS 5/19-130. All three provisions sit in Article XIX of the Code of Civil Procedure, the replevin article.

Replevin remains the civil action to recover goods or chattels wrongfully taken or wrongfully detained. The amended Section 19-101(a) keeps that language. The Act adds companion animal provisions to the existing framework rather than creating a family law proceeding.

Under new Section 19-101(b), a companion animal is an animal commonly considered to be, or considered by the owner to be, a pet. The definition is not limited to one species. It includes canines, felines and equines, among other animals.

New Section 19-101(c) also identifies who may be treated as a party in a replevin action involving a companion animal. The category includes domestic partners, former partners, cohabitants, fiances and roommates when shared responsibility for the animal's care can be demonstrated. That condition matters. The relationship alone does not establish status as a party under the new provision.

The court may weigh welfare without changing the property framework

New Section 19-130(a) says that, in a possession dispute involving a companion animal, a court may consider the animal's well-being regardless of the parties' legal status. The statute uses "may," not "shall." The decision remains discretionary.

The Act's legislative findings state that Illinois law had allowed courts to consider an animal's well-being primarily in dissolution of marriage proceedings, while courts handling disputes between unmarried parties might lack specific statutory guidance. The Act identifies its purpose as giving courts guidance in companion animal possession disputes "while preserving existing property law principles." It does not reclassify animals as something other than property.

The listed evidence includes the history of daily caregiving; feeding, grooming, veterinary and training involvement; financial contributions; emotional bonds; stability and continuity of the animal's living environment and routine; safety considerations and past conduct affecting the animal; credible witness testimony; and the animal's age and physical or behavioral vulnerability.

Ownership documentation is relevant, but it may not be determinative by itself. For an animal at least 10 years old, the court may give additional consideration to continuity of environment, emotional stability, stress minimization and established routines. The court may order mediation when appropriate to resolve possession issues.

Temporary possession can address disruption during the case

New Section 19-106.5 permits the court, at the initiation of and during the replevin dispute, to issue temporary possession or caregiving orders. Those orders may include limited visitation if necessary to reduce stress or disruption to the animal.

The provision connects that relief to the discretion described in Section 19-130. It also preserves the existing notice exception in Section 19-106 when the court finds that summary seizure is justified by necessity. That finding must appear on the record and be supported by evidence. Section 19-106 allows notice to the defendant to be skipped only on one of five grounds: imminent destruction or concealment of the property, imminent removal of it from the State, its perishable nature, an imminent fraudulent sale, transfer or assignment, or recovery from a defendant who obtained possession by theft.

At an ex parte hearing on notice, the court examines the evidence on each element. If it finds notice unnecessary, it orders a hearing as soon as practicable on entry of a replevin order. The new companion animal provisions do not remove those requirements.

The 2027 Act reaches unmarried parties through civil procedure

Illinois already directs courts to consider an animal's well-being in a different setting. Under 750 ILCS 5/503(n), if a court finds that a companion animal is a marital asset, it shall allocate sole or joint ownership and responsibility for the animal, and it shall consider the animal's well-being in making that order. Public Act 100-422 added that provision, effective January 1, 2018. It excludes a service animal as defined in Section 2.01c of the Humane Care for Animals Act.

The difference is direct. The 2018 dissolution provision is mandatory because it uses "shall," and it applies to married parties in a divorce. Public Act 104-0613 is discretionary because it uses "may," and it operates through replevin for disputes outside the dissolution statute.

Other states that have legislated on companion animals did so inside divorce or dissolution law. Alaska Statutes 25.24.160(a)(5), enacted by House Bill 147 and effective January 17, 2017, directs a court entering a divorce judgment to provide for ownership or joint ownership of an animal while considering the animal's well-being. California Family Code section 2605, effective January 1, 2019, lets a court in a dissolution or legal separation assign sole or joint ownership of a pet animal after considering its care. New York Domestic Relations Law section 236, Part B, applies in a divorce or separation proceeding and directs the court to consider the animal's best interest when awarding possession.

The Animal Legal Defense Fund has claimed, as reported by the ABA Journal, that Illinois enacted the nation's first law aimed at pet disputes between unmarried people. Its senior staff attorney Kathleen Wood said many states address pets in divorce but none had addressed separations of unmarried cohabitants.

The bill moved from a narrow proposal into Article XIX

Rep. Barbara Hernandez filed House Bill 4540 on January 22, 2026. The House Judiciary - Civil Committee reported it do pass on March 25 by a vote of 13-7.

As introduced, the bill created a freestanding Companion Animal Custody Equity Act, and its definition covered only a domesticated dog or cat residing in a household. House Floor Amendment No. 1, filed April 7, replaced everything after the enacting clause. The amendment moved the substance into the replevin article and broadened the definition to the open-ended category that includes equines. The House adopted it April 14, the same day the House passed the bill 72-38.

Sen. Linda Holmes was the Senate chief sponsor. The Senate Judiciary Committee reported the bill do pass May 6 by 8-0, and the Senate passed it May 19 by 52-7. Governor JB Pritzker signed it July 24, making it Public Act 104-0613.

January 1, 2027 controls the filing, proof and interim relief analysis

Nothing changes for a dispute today. Public Act 104-0613 becomes effective January 1, 2027. The Act does not state how it applies to cases already pending on that date.