Council probe: parvovirus outbreak, limited isolation and emergency euthanasia at St. Louis County shelter

St. Louis County council members pressed shelter staff on Aug. 7, 2025 about a parvovirus outbreak that staff say overwhelmed the county animal shelter in April and led to emergency euthanasia decisions when isolation and treatment capacity ran out.

Dr. Marissa Bowers, the shelter veterinarian who began working at the facility on March 3, 2025, described being alerted by a memo in mid‑April and finding cases that could not be isolated because the shelter lacked sufficient quarantine space and foster capacity. "We ended up quarantining Room 500, which is our biggest dog holding room, for about nine days," she said. When cases later reappeared and the number of symptomatic animals grew, "we were able to isolate five animals total in our Isolation Room, which is Room 650," she testified, adding that cases then spread into rooms labeled 300, 400, 600 and 700.

Bowers told council members that the shelter did not have a formal parvovirus outbreak management SOP when the incident began; instead she consulted industry guidance and university protocols and used a newly developed internal quality‑of‑life pathway. "So this SOP that we put together, it's based on best practices provided by Best Friends," she said, describing a checklist and daily population rounds intended to maximize live outcomes.

But with cases rising "exponentially," Bowers said staff faced a practical limit. She recounted working with on‑site operations staff and, in conversation with senior medical staff, recommending humane euthanasia for animals she could not isolate and treat appropriately. She testified that two animals were euthanized early and that, as the outbreak progressed, more animals were euthanized, including "17 that day, so 19 total," a figure she gave under questioning.

Council members repeatedly asked whether euthanasia decisions were made through a written committee protocol or ad hoc; Bowers said medical staff and operations discussed lists in morning meetings and that euthanasia decisions were primarily medical. "It was more of, like, an internal decision, but there was no procedure in place as far as how to handle this in an outbreak situation," she said.

The veterinarian described limited supplies early in her tenure — for example, temporary shortages of IV lines during the outbreak — and said some controlled drugs and routines were not yet fully transferred or available under county administration. She listed sources consulted for outbreak guidance, including the Association of Shelter Veterinarians and ASPCA flowcharts, and said Best Friends was providing treatment protocols and on‑site guidance during the weeks after the outbreak.

Council members also questioned the shelter's use of volunteers during euthanasia. Bowers said volunteers were sometimes allowed to be present with staff for the peaceful passing of animals they knew, but that there was no formal written policy, volunteers did not sign releases and county legal review had not been sought before the practice was used.

The hearing produced several specific operational details: the shelter used a three‑color (orange/yellow/red) urgency pathway based on welfare measures; the Dunbar bite‑severity scale (1–6) was one criterion used to guide red‑pathway decisions; bite holds are normally 10 days; and quarantine for a particular holding room initially lasted about nine days. Bowers also said intake vaccine and tag distribution processes were inconsistent and that she lacked visibility into all inspection failures early in her tenure.

Council members asked the county counsel present to prepare written legal guidance on liability questions raised at the hearing — for example, the extent of county liability when foster families or volunteers take animals with known bite histories. County counsel said he would provide a written opinion.

The committee requested further documentation including an organizational chart and the written SOPs and photographic documentation APA staff said they left at transition. The hearing continued with additional witnesses on management and the earlier contractor's (APA) role.