Rodents often get under San Diego homes through torn crawl-space covers, open vents, gaps under doors, loose flashing

https://stephenctho009.scriblorax.com/posts/the-link-between-crawl-space-rodents-and-the-air-inside-your-home

Rodents often get under San Diego homes through torn crawl-space covers, open vents, gaps under doors, loose flashing, and openings where utility or A/C lines enter exterior walls.