On a chilly wet day in mid January, Angela and Karl Wagner were out walking their 4-year-old Samoyed mix, Laszlo, in Philadelphia’s Society Hill neighborhood when he suddenly started yelping and shaking violently. “ We immediately started going into like a triage situation where we’re like grabbing his body, trying to figure out like did he get stuck with anything? Is he bleeding,” said Karl. The couple panicked, unsure of what was happening. It didn’t appear that Laszlo had stepped on glass.