Chelsey,
You've come to the right place! I did a quick search of "SOPs" here on the forum (top right search field) and found a bunch of SOPs other forum members have shared over the years in our forum library including the two awesome cat and dog intake SOPs Kirstin mentioned above. There's even a "generic SOP template" from the ASPCA.
Here's a link to those results.
------------------------------
Kim Domerofski (she/her)
Community Manager
Maddie's Fund
------------------------------