My 6yr old collie Bitch seems to be drinking to moch water. I have been to the vets nd she ha shad vaious tests but no joy yet so we are going back tomorrow. Her specific gravity was 1.003. We have had her seperate from my other dog (male collie 13 months) for a couple of days and her drinking seems more normal.

When we would play in the room with both dogs she would stop and just go and drink and drink and drink and drink then play for a few minutes then drink.

Has always seemed to be at night and whenever i am around both dogs in thier room.
Trouble really came to light as she had started to sometimes pee in the room. Even is she had been out an hour os so before. I could leave her for 10 mins and she would have peed. Has happenned when I am in the room and she has been sleeping next to me on the sofa the just got up and peed in front of me.

Is this likely to be behavioral?

I wouldn't think it is behavoural in a 6 year old dog. When you and your other dog is out of the room she may just be sleepng so doesn't drink.
This could be as simple as a UTI but could also be kidney failure.
Keep seeing your vet and I hope it's not too serious

Is she spayed? Excessive thirst is one of the first signs of pyometra but your vet should have thought of that right off if she is entire.

Hope you on well at the vets.

Sgurr

Had crossed my mind too - If she's not been spayed has she recently had a season - there is another major cause in my brain (haggled)- but it's escaping me at the moment

She has been spayed. Was done as a pup. Have been back to the vets for tests for Cushions disease? But no further forward will get results in a week.

The annoyance is the fact that she sometimes pees in the room now with drinking so much. We are due a baby in Feb, so want to get the problem sorted.

It could be behavioural, is she stressed by your other dog at all ? when did it start ? did it coincide with him reaching maturety ? Drinking can be a displacement activity, I have also met dogs that drink loads so they can pee loads, peeing is on ofthe ways a dog gains relief.

could it be the food shes eating at all making her drink so much.

The two dogs get on fine together. Spend all day together. It started a few months ago and seems to be mostly in the late evenings / nightime when I am with them both. I have wondered if it was behavioral and have mentioned as such to the vets. Trouble is you finf yourself in a catch 22. Keep paying vet fees incase their is something wrong and their isn't but call it quits thinking it is behavioral and something happens....

HEr food hasn't changed.

Neither dog seems to be particulary dominant. They play fight and interact alot together and if they are playing with other dogs she will herd and nip him. He tends to ignore her. He is slightly food aggressive - but now fed seperate. If it is behavioral ( which after reading Jenny's reply I feel quite strongly it might be) how do I deal with it? At what point do I stop tests?

Martin