An environmental cause can include a drug, alcohol or a disease the mother has that can increase the chance for the baby to be born with a birth defect. An agent that can cause a birth defect is known as a teratogen. Multifactorial birth defects are caused by a combination of genes and environmental exposures.
National Rescues. Lyme Disease May Cause Sudden Aggression in Dogs Written by Betsy Sommers of. Peppertree Rescue, Albany, NY, USA. 28th May 2004: We recently had a very strange event that I think we should share around the rescue community. A Young (~2 years) Lab mix, male, came into our program with a questionable background.
Reddish-brown adults like the one shown here are only one-eighth of an inch long. Tiny immature ticks that are about the size of a poppy seed also bite. Deer ticks infected with the bacteria Borrelia burgdorferi can cause Lyme disease in people, dogs, and cats. You might not even notice the tick or its bite. But if you do, remove the tick within 48 hours to limit your chances of getting Lyme disease.