Hi Pyometra normaly occurs 1 to 2mnth after heat symtoms are a dark greenish smelling discharge, drinks alot can have fever, tiredness,and depression, if your bitch has these signs. Ithink you should take her to vet asp. he will do blood tests and ultra sound scan if so then suggest you have her spayed. hope this info has helped. Good luck Love WendyX Fifi
And Lulu