When Janet Riordan returned home from a European vacation in January, she expected a storm of tail wagging and barking from her seven-year-old golden retriever, Reggie. The moment she saw him, she knew something was wrong. “He came to me in my arms and appeared to be sobbing. I had never seen an animal behave like that,” said Riordan, who lives in Mequon, a suburb of Milwaukee, Wisconsin.
Janet Riordan lost her 7-year-old dog, Reggie (left), to lymphoma, the same disease that killed her father. Credits: Charlie Sykes 
Lawn pesticides may increase the risk of lymphoma in dogs and in people. Credits: A. Davey/Flickr(CC) 
Credits: Elizabeth/Flickr(CC) 
Brominated fire retardants, used in upholstery and electronics, have been linked to an increase in hyperthyroidism in cats. Credits: Elizabeth/Flickr(CC)
