I went out for a few hours today, when I came home there was blood on the kitchen floor and on his bed. We checked him and its when he pees. I phoned the vet who said to bring him up in the morning as he is acting normal eating, drinking and jumping around. I am really worried as this month he has to go and get a retained testicle removed could this be the cause? He is 1 year old.

Think it unlikely, it is more likely to be an infection of the urinary tract but it is best to wait and see when you see the vet.

When this happened to my friends dog it turned out he had "damaged" himself on something.  The wound didn't show until the vet exposed the 'inner workings' of his penis!  He had a nasty injury but soon recovered.

You could check .......!

Do you have 2 dogs because if so this could be the reason:
This happened to Dozer. I pulled back his sheath and noticed some bite marks, his sister T-Bone bit it do to him humping her face. I no sounds discusting but dogs do do this, he was bleeding. Even two pups I sold both male one of them had the same thing, I showed them the bite marks because they called me all worried because he was bleeding when he peed and also it was just dribbling out...I told them to not allow that kind of behaviour because they can cause real bad damage to each other and an infection.....

If not then I do hope he is fine and nothing serious :)

This is true, was going to say has he tried to mate but thought the poster would have said, but may be they did not think it relevent.

Went to vet this morning who thinks its an infection thank god! He's on antibiotics for a week then he goes for his operation (dreading that). The vet thinks it would be better to castrate him rather than just removing the retained testicle as long as he's ok I don't mind although I hope this won't change his nature. Thanks for the replies I was thinking the worst when I saw the blood.

Would want to leave more than a week between the infection and the major operation. IMO a couple of months at the very least, to make sure the dog is not going to become re-infected.

Bailey got antibiotics on Tuesday and has been fine until today when he got up from lying on floor there was blood all over him probably looks worse because he is white. Phoned vet who thinks its prostate trouble I have to keep him on tablets plus give him a disprin and take him up on Monday morning. Has anyone else had this problem? He is still eating, drinking and peeing feeling sorry for himself so he can lie on sofa just hope he is ok.

we recently had to have our 8 year old GSD castrated due to a cyst on his prostate found on ultrasound...it started with intermittent blood dripping to passing what looked like all blood when he peed....no other symptoms happy in himself eating doing all his usual things...the idea of castrating him was because the prostate is influenced by the male hormone by removing the testes allows the prostate to shrink.....have had no problems since the op...