My new little rescue bitch has just come into season. I have never had an entire bitch before and it set me wondering, do animals get pain like women do when they are menstruating ? Never really thought about this 
This morning came down to a poo in the kitchen and wee on the carpet! Its frustrating because she gets plenty of outside time but wont wee then ! Normally she only has about two wees a day, cast iron bladder. Does seem to be quite a bit on line about in season bitches doing this, but other people say theirs never do. I do have a neutered male dog so maybe thats why she does it indoors, although she doesnt show any interest in him at all. Seem to be in stuck in a poo/wee situation at the moment as horse that does Guinness book of record poos is now in at night pooing in his stable and walking it in till the bedding is rank !