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.
How much does luxating patella surgery for a dog cost? The cost of surgical treatment will depend on the vet, where you live, and severity of the problem. On average, each affected knee can cost $1,500 to $3,500. On top of the surgery, your dog will also require long-term medications, which can add another $20 to $50 per month.