Very Sick Dog

Currently like a scene out of the exorcist in my house at the moment. Poor Louis has just been very, very violently sick. I noticed he was a bit "loose" on our walk this afternoon but it didn't seem too bad. I thought there was a problem when he didn't want my left over pizza crusts, but didn't expect this! Don't wish to go into details but I have never seen sick like it. I will have to watch him closely and decide whether a trip to the vets is necessary. Poor old thing! Unfortunately Cassie doesn't seem to realise he is under the weather and is still insisting on playing with him - me thinks there could be tears before bedtime!