why is my dog swollen and bleeding?

[dogo]

how long does a dogs menstrual cycle last and is it normal for swelling to occur?

[PurplePixie]

If you mean swelling of the dogs bits at the back (sorry wot a wuss, trying to think of a polite way to say it!) then yes, they do swell up when they are in season.

[Ray the DJ]

If I was concerned about a dogs health, I wouldn't submit questions here, to be answered by amateurs. I'd take the dog to a vet.

[mrs.pudding]

our bitch's private parts look like a baboon's bottom when she is in season! Not a pretty sight, but normal!