Onions contain a compound which is toxic to the red blood cells of cats. The red blood cells are destroyed and this results in anemia. The specific type of anemia is called 'Heinz body anemia' because the red cells develop an abnormality called a 'Heinz body' which can be seen under the microscope.
Dug, the dog, is easily distracted by ... squirrels (well, he's easily distracted by everything, but especially squirrels). He can be talking (yeah, it's Pixar/Disney so the dog talks) & right in the middle of the sentence, he shouts, Squirrel!. Then he carries on with whatever he's talking about.
Displaying his Super Sleuth medallion. Buster is Darby 's dog in the CGI-animated Pooh series My Friends Tigger & Pooh. Voiced by Dee Bradley Baker, he is a curious and inquisitive dog who likes to yap loudly when he is either excited or on the scent of something. Buster is not of any recognized breed of dog and is likely a mutt.