Thankyou so much for your posts
After posting on here, Ollie was vomiting again, when I got to the vets he couldn't even walk up the steps, I have to say I was beside myself in the vets

The vet said that the only option was to open him up, as he didn't feel he could last much longer as he was, but did stress the anaesthetic was a high risk in his condition.
I have to say I've been frantic with worry, but the vet has just rang up, there was a blockage in his bowel, he found something which looks like the stalk from a plant or vegetable (Ollie is a terrible scavenger, my bin even has a lock on it !). He is awake from the anaesthetic, and on a drip to rehydrate him again. I can collect him sometime after 6pm. He still needs to be closely watched for the next few days as there is a high risk of infection apparently from his bowel contents............but I am sooooo relieved that they found something.
A very optimistically happy Annie

Ps. I'm really glad that your dog is on the mend Elisa

it is so worrying when they are ill.