I've had blood test and urine and faeces tested she is still happy in herself and plays seems to be on alert all the time doesn't sleep well also she doesn't drink a lot of water I've change her food several times her urine at one time had a foul smell because she started to have accidents

Dog eat to fast changed diet from dry to wet still losing weight has been to vets had faeces and urine checked

I would run bloodwork to make sure there isn't anything urine and stool can't see.
In the meantime, you can try to feed your dog small amounts at a time to avoid bolting the food. If you end up feeding dry again there are special food bowls that force a dog to eat slow - or you could throw a large (not able to swallow) rock in the bowl to force it to eat slower.

What kind of dog, how old, what do you feed her, how often?

How old is she?

What has her vet said? It will help us have an idea of what to suggest trying next.

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Originally Posted by joypulv

What kind of dog, how old, what do you feed her, how often?

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Mixed yorkshire terrier 6yr now on chappie vet said it would help twice a day and snacks during day

Has the vet given you any idea of what is going on with your dog? Does he/she think your pup is healthy other than how it is eating or that something else could be wrong? How long has this been going on? Did something in her environment change such as adding a new pet or baby to trigger this behavior?

To add to Sariss' suggestions, some people have found that using a muffin pan to separate the food into smaller portions helps.