Hypoallergenic dogs (medium size) are recommended but have special needs because they are usually smaller in size and have temperaments that may be difficult to handle sometimes. When you first bring your new dog home, you should allow it to roam around to get an idea of its surroundings. If you have other pets, you should put them in another room while the dog is investigating the area. Depending on the breed of dog, they may be terrified at first. They may not enjoy any human contact.