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.
The cost of castration or spaying a dog can vary a lot depending on the type of dog you have so itâs best to check with your vet. Several charities, including The Blue Cross, can help with the cost of neutering dogs so contact your nearest one to find out more. Some breeds of dog can have as many as 12 puppies in just one litter. 2  Thatâs a lot of mouths to feed and the costs will soon add up. 3  Female dogs in heat can be messy â they produce a bloody discharge for three weeks or more.