My 4 year old (soon to be 5, on the 22nd of this month) unaltered female Jack Russell/Chihuahua mix has bloody diarrhea. She had this about 5/6 months ago. She isn't lethargic, she will eat, she is traumatizing the cats (playfully), and seems fine other than her loose bloody stool. She usually comes into heat in June/December the same time both these instances have happened. Are they related? Since she isn't lethargic and willing to eat, she is going on a bland diet, starting with homemade chicken/rice broth.