I would support regulations............. if you could show examples of any government doing anything at all efficiently and with fair balance. Is your example not an illustration of utter failure of already existing regulations. i.e. Mental health and protective custody laws.
The SPCA is no better, instead I prefer to support independent community no-kill shelters.
Then there are groups like PETA, responsible for more animal suffering and death than you'd ever believe. Those grade-A scumbags would stomp on a kittens head and make a video of it if they thought it would get them more donations.