Have a question about the death of my German Sheppard dog. She went from healthy looking and walking around with no problems to foaming at the mouth and then death, all within 5-6 hour span. She ate a good supper about 4pm and then started showing signs at about 6-7pm. Anybody have any clue what could cause that? I'm suspecting poison but she is kept in a 1 1/2 acre fenced in yard and hasn't been out of the fence in years. Searched the yard and couldn't find any sign of food or anti-freeze anywhere. Thanks in advance for any info.

