The first trip we made to the vet ,The situation seemed dire indeed .I refrain from using too many adjectives because [:'(]of the nature of the problem and it is somewhat repulsive .Repulsive aside she had a heavy effusion and it was a dark color ,Its not constant but comes and goes.She seemed sick ,I know my animal pretty well but i am ashamed to say that she has to be in a fair amount of discomfort before i can perceive it ,she seems to hide her ailments .She leads a Very sedintary life .Sleeping being what she does most .On our second trip ,she was a very happy dog ,lively ,nearly getting a guy outside ,very happy .And the effusion was completely nonexistent for the entire trip,She was there for around four hours .I myself thought problem solved ,but that very night it came back .She eats fine ,she pees ,she drinks water ,She plays .she has gotten smart aboult my hiding the antibiotics in her treats and she scared me pretty bad the other day when she refused a hot dog weinie,She was wise tho and i have taken to hiding the pills better .As i write this the situation seems better ,I have searched her bedding and the surrounding floors for the (skidmarks)and cannot find anything notable so perhaps this thing has been turned aside ,I almost feel like i have painted my vet in a bad light ,And to be sure its not the most advanced vets office in existence ,He has no ultrasound, but if i had to post a complaint it would be that his office is absolutely packed from door open to close ,and the people there are fiercely loyal to him ,I am also .But ,..,sometimes that trust goes only so far .He is human also .But weve lost animals at other vets offices that shouldnt have been lost ,(A Siamese cat with a ruptured bladder comes to mind )And there are offices that i simply will not visit because they have turned animals away that were sick ,(strays )And i know that goes back to the spay thing . We are very proud of our lil hometown vet here even if i do wonder if he is right at times .My main problem with this whole thing is that we dont have a definite diagnosis .Therefore i dont have any preventative actions to take to keep it from recurring if it is cured even .I have been suspicious of the pad i make her wear when she is in heat ,perhaps it was the root of this infection . I am to take all of your advice however and were gonna get her spayed as time and finance and health permit .I want to thank you all for reading my post and taking the time to reply .On a lighter note i will tell you a weee bit more aboult my girl ,She loves stuffed animals .Apparently she doesnt like them to look at her though,And thus she will carefully remove their eyes.(By the way she will trim her own toenails..And does a very nice job )And so i have a room full of little stuffed bears ,frogs,winnie the poos and tiggers too ,(The thrift store sells them very cheap so we get three or four for her when were by there .)And the one single common thing aboult all these stuffed toys is that where thier little black eyes used to be there are now white holes.I noticed my neighbor get uneasy when he asked what happened to all their eyes ,and i realised that coming into it with no knowledge of the situation .Its creepy .My lord i have run on ,... If your still with me Thank you for the time and suggestions ,I intend to get her spayed asap and if this thing isnt gone before the antibiotics are i am to get a second opinion even though i feel like i will be blaspheming to do it .