I am currently fostering 2 shih tzus for a friend. Manda is 5 and Gus is 8. Neither is altered. Manda is all of a sudden snapping at Gus. When we go on our potty walks and she "wees", Gus tries to drink her "wee". He has not tried to mount her. Gus just whines all the time. I have seen no blood from Manda. I keep checking. She has never been pregnant. I have noticed everytime she has been sitting or laying down when she gets up there is a wet spot. It is not urine but Gus goes immediately over to it and starts licking at it. Manda is also vey swollen.I just need some input on what may be going on. Thanks for any help anyone can offer.