I wanted to say thank you all for your feedback. Roar hasnt had any episodes in the past 3 days so thats positive and we will keep our fingers crossed. One other thing that i remember happening that day that probably has nothing to do with it but I just remembered. I live in the city and it had snowed 8 inches that day and where i live people use a lot of salt on the sidewalks and i remember him licking his paws after returning from our walk. Not sure if all that salt on his paws had something to do with it but maybe.?? I have been really wiping his paws off since :-) .....Thanks and Good luck to everyone.