We were nearing the end of our walk. My DH had our mixed breed, and I was walking our pom, when I looked down and saw him laying on his side, limp, but with his limbs convulsing. I picked him up, and he was limp, and vomiting. Finally, it stopped. We're all so upset. He seems fine now, but it scared me. Has anyone else had any experience with this type of thing?