Heather, it doesn't sound as if your cat were seriously intoxicated by the saponins in those leaves. Forceful vomiting can rupture capillaries in the stomach lining resulting in hematemesis - blood in the vomitus. As long as vomiting doesn't persist, the stomach lining will heal itself within 24 hours. There's no need to treat him at this time. Persistent vomiting should dictate a vet to administer an injectable antiemetic and antacid.
Please respond with further questions or concerns if you wish.
You bet. An 8 hour fast until breakfast is just the ticket. Feed his usual food. I can't set a follow-up in this venue so please return to our conversation - even after rating - with an update at your convenience. You can bookmark this page for ease of return.
Thank you for your kind accept. I appreciate it.