thanks for your replys.
I feed him in the morning between 5:30 and 6 am as i have to work at 7. and then again between 5 and 6 in the evening. I wait an hour after eating before bringing him out to the bathroom because he is a very energetic dog. I will try your suggestion in feeding a bite or two before bed. I have found that it started around the same time he became very intrested in destroying his rope bone and toy. And this is what he has been munching on before bed. So I think i will take away the toys and give him a small bite before bed. He is eleven months old and has only been with me a week. The runny poo I contributed to his change in diet. It seems to be firming up a bit now. But then this happened and I didn't think that it might be serious untill I read some things here. But I will just keep his appointment next week unless he continues vomiting over the weekend after i take his toys away. Thanks.