1) https://www.durangoherald.com/articles/dogs-multiply-as-pandemic-hinders-vet-service-on-navajo-nation/
2) https://www.santafenewmexican.com/news/local_news/from-friend-to-foe-free-roaming-dogs-overrun-navajo-nation/article_dd89c186-c7b4-11eb-981a-076b433cb16c.html
3) Florida Fish and Wildlife Conservation Commission https://myfwc.com/wildlifehabitats/nonnatives/feral-cats/
4) Utah State University https://extension.usu.edu/wildlife-interactions/featured-animals/other-animal-topics/straycats
5) Belsare, A., Vanak, A.T. Modelling the challenges of managing free-ranging dog populations. Sci Rep 10, 18874 (2020). https://doi.org/10.1038/s41598-020-75828-6
6) BBB Wise Giving Alliance https://give.org/charity-reviews/national/Animal-Protection/Humane-Society-of-the-United-States-in-Washington-dc-52546
7) Charity Navigator https://www.charitynavigator.org/ein/530225390
8) Charity Navigator https://www.charitynavigator.org/ein/530225390
9) https://www.activistfacts.com/organizations/hsus-humane-society-of-the-united-states/
10) Charity Navigator https://www.charitynavigator.org/ein/237147797
11) BBB Wise Giving Alliance https://give.org/charity-reviews/national/Animal-Protection/Best-Friends-Animal-Society-in-Kanab-ut-52209
12) American Society for the Prevention of Cruelty to Animals (ASPCA) - Activist Facts; https://www.activistfacts.com/organizations/american-society-for-the-prevention-of-cruelty-to-animals-aspca/
13) https://www.causeiq.com/directory/animal-organizations-list/
14) University of Florida https://sheltermedicine.vetmed.ufl.edu/about-us/
15) https://bestfriends.org/stories/julie-castle-blog/hurricane-harvey-animals
16) Garde, E. et al. Characteristics of a Canine Distemper Virus Outbreak in Dichato, Chile Following the February 2010 Earthquake. Animals (Basel). 2013 Aug 27;3(3):843-54. https ://pubmed.ncbi.nlm.nih.gov/26479537/
17) American Heartworm Society https://www.heartwormsociety.org/in-the-news/97-katrina-s-pet-refugees-the-heartbreak-of-heartworm
18) https://invivobiosystems.com/disease-modeling/hurricanes-heartworms-extreme-weather-spread-worms/
19) Shamsaddini, S. et al. Dynamic modeling of female neutering interventions for free-roaming dog population management in an urban setting of southeastern Iran. Sci Rep.. 2022 Mar 21;12(1):4781. https://pubmed.ncbi.nlm.nih.gov/35314736/
20) McCarthy, RJ et al. Estimation of effectiveness of three methods of feral cat population control by use of a simulation model. Journal of the American Veterinary Medical Association (JAVMA). 15 Aug 2013. https://avmajournals.avma.org/view/journals/javma/243/4/javma.243.4.502.xml
21) Boone, JD et al. A Long-Term Lens: Cumulative Impacts of Free-Roaming Cat Management Strategy and Intensity on Preventable Cat Mortalities. Front. Vet. Sci., 26 July 2019, Sec. Veterinary Humanities and Social Sciences, Volume 6 – 2019. https://doi.org/10.3389/fvets.2019.00238
22) Gunther, I et al. Reduction of free-roaming cat population requires high-intensity neutering in spatial contiguity to mitigate compensatory effects. PNAS Vol. 119 | No. 15. 2022. https://doi.org/10.1073/pnas.211900011
23) Gotsis, Tom. Feral cats: Do Trap-NeuterReturn programs work? NSW Parliamentary Research Service December 2014. https://apo.org.au/sites/default/files/resource-files/2014-12/apo-nid52073.pdf