Scooby is two years old. As far as we are aware he hasn't had anything different to eat but who knows what the monkey has been mouching around in on his walks. We did wonder whether it was the Christmas tree, although he never had a reaction last year. Anyway we will keep our eye on him - his symptoms seem to have settled down a bit but he is a little more sleepy and has been shivering a little (however he does shiver quite easily when chilly.)