What does the ONVIF event look like? If you have ONVIF Device Manager you should be able to see it. Or if you can name the rule in the Reolink cam. Once you know/set what it's sending, then you may be able to set up your own event in that same section of BI using the Contains. e.g., If it sends the word "Pet" in some form, then Contains Pet. Or if it doesn't say Pet but shows as Rule 1 or some other identifier for that specific rule, you could use that identifier knowing that camera rule equates to pet detection.