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.
This repair is generally less expensive, however, since fancy hardware isnât required. And dogs under 25-30 pounds may be sufficiently well served by this simpler extra-capsular repair. The price of this procedure runs as low as $500 and as high as $2,500.