What is it about?
Animal shelters have limited resources to promote adoptions, such as better kennel placement or online visibility. This study shows that, when promotional efforts increase adoption chances proportionally, they should be focused on animals that are harder to adopt. These slow-track animals typically remain longer in the shelter, so helping them leave sooner reduces the overall shelter population more effectively. In short, to reduce crowding and improve outcomes, shelters should prioritize marketing resources for the animals that need them most—not the ones already likely to be adopted. The study models adoption as a probabilistic process and evaluates how marketing interventions affect adoption rates. Under the assumption that interventions have a multiplicative (proportional) effect on daily adoption odds, the analysis compares the impact of applying those interventions to different groups of animals. The results identify which allocation strategy produces the greatest reduction in overall time spent in the shelter.
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Why is it important?
Shelters constantly face overcrowding and limited staff time. Decisions about which animals to promote are often based on intuition, visibility, or perceived adoptability. But there has been little formal guidance on how to allocate scarce promotional resources to reduce length of stay and overall shelter population. This paper provides a clear, quantitative framework for making those decisions. It can be tempting to promote the most appealing animals to boost quick adoption numbers. But the study shows that strategic allocation can reduce crowding more effectively. Shelters can improve outcomes without increasing resources.
Perspectives
The cutest, most popular animals are fun to showcase, whether in more visible areas of the shelter or on social media. But staff and volunteers worry the most about the types of animals that aren't quickly snapped up. Volunteers, in particular, often launch their own social media promotions of these slow-track animals. Obviously, any animal benefits from marketing. But I decided to model what the impact of marketing promotions on the shelter as a whole. For the shelter, the objective is to adopt animals out fast enough to reduce (or at least not increase) the census count of animals in-care. The result of this study is: If an intervention has a proportional effect on adoption odds, it should be allocated to slow-track animals first, i.e., to the animals that usually experience slower adoption rates (and longer stays). Marketing resources (visibility, promotion, kennel placement, etc.) are limited. Using them strategically benefits the whole shelter population, because a reduction in census frees up resources for better care.
Michael Mavrovouniotis
Social Compassion / SCIL
Read the Original
This page is a summary of: Marketing of Slow-Track Rather than Fast-Track Animals Reduces Mean Length of Stay and Animal Shelter Census Count: A Theoretical Study, Animals, April 2026, MDPI AG,
DOI: 10.3390/ani16081158.
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