What was JJ Thomson Atomic theory? Joseph John Thomson discovered the electron in 1897. In 1904,  Thomson suggested a model of the atom as a sphere of positive  matter in which these electrons are positioned â¦by electrostatic  forces.
Cost of Perineal Hernia in Dogs. Stool softeners for dogs are usually $15 for 40 soft chews. Consult your veterinarian before trying human stool softeners on your dog. Enemas ($4 for a 4 pack) are another option.
First-Degree Atrioventricular Block can be an expensive treatment in dogs and can range from $50.00 to $2000.00 depending on the cost of living and severity of your Dog's first-degree atrioventricular block. On average, the national cost of treating first-degree atrioventricular block in dogs is $700.00.