Rosie’s Law in Illinois

Who the new law covers

The statute’s definition of parties includes domestic partners, former partners, cohabitants, fiancés, and roommates if they shared responsibility for the companion animal’s care. Ownership and entitlement to possession still matter. Someone who simply lived in the same home, or temporarily pet-sat, should not assume the statute gives them ownership rights.

What changes—and what does not

The Act amends 735 ILCS 5/19-101 and adds 735 ILCS 5/19-106.5 and 735 ILCS 5/19-130 within Illinois replevin law. Its companion-animal framework addresses well-being and possession/care-related relief in qualifying proceedings. Replevin remains a legal action concerning property wrongfully taken or detained.

This is separate from the existing divorce rules in 750 ILCS 5/503(n) and 5/501(f). It does not turn every disagreement into a child-custody case, establish automatic joint ownership, or promise that a court will divide time with the pet.

What the court may consider

Under new section 19-130, a court may consider the animal’s well-being regardless of the parties’ legal status. The listed evidence includes daily caregiving; feeding, grooming, veterinary and training involvement; financial contributions; emotional bonds; stability of the home; safety and past conduct; credible witnesses; age and vulnerability; continuity of routine; and ownership documents, which may not be determinative on their own. For animals age 10 or older, the court may give additional consideration to continuity, emotional stability, stress reduction, and established routines.

Temporary possession and caregiving orders

New section 19-106.5 allows a court to issue temporary possession or caregiving orders, including limited visitation, if necessary to reduce stress or disruption during a replevin dispute. Summary seizure still requires the evidence-supported necessity findings specified in section 19-106. Under section 19-130(b), the court may also order mediation when appropriate. These powers are discretionary, not promises of relief.

Before and after January 1, 2027

Before the effective date: nonmarital disputes generally rely on ownership, entitlement to possession, agreements, and available property-recovery remedies. Beginning on the effective date: the new companion-animal provisions apply according to the statute and the procedural posture of the case. Do not assume they apply retroactively to earlier events or proceedings.

If your pet is being threatened, transferred, or withheld now, request a consultation about available options rather than waiting for the law to change.

Evidence to gather

• Adoption or purchase documents, microchip registration, licenses, and written ownership agreements.
• Veterinary records, payments, medication logs, and evidence of daily feeding, walking, and care.
• Messages about shared responsibility, the separation, possession, and requests for return.
• Housing, safety, and medical information relevant to the animal’s well-being.

Keep the original records and avoid confrontation or taking the animal by force. See the evidence checklist and Illinois breakup guide.

Agreements and dog-return options

A written pet custody agreement can document ownership and agreed care arrangements. If a pet is wrongfully withheld, discuss a demand letter or replevin action with an attorney. A letter does not compel return, and court relief is not guaranteed.

Official Illinois sources

• HB4540 status: Public Act 104-0613
• HB4540 enrolled statutory text
• Public Act 104-0613 PDF (copy hosted by Rosie’s Law Initiative)

Discuss your Illinois pet dispute

Call or text 312-270-1405, or request a consultation. Tanner-Flomberg Law Group’s attorneys are licensed in Illinois and Tennessee. For other states, we can connect you with an independent local attorney; no referral fees are paid or received, and you choose your lawyer.