Getting Terrier/Chihuahua pups this weekend, advice? PLEASE READ?

A dog that doesn't have puppies is not missing anything. Spaying and neutering pets can prevent many medical problems as well as more unwanted pets. Inbreeding in dogs can result in severe medical problems for the puppies. Dogs don't have a desire to have puppies like humans have a desire to have babies. For a dog it is just a way to get their genetic material passed down. Please spay and neuter your pets. Don't contribute to pet overpopulation. Any responsible rescuer will have you sign a contract that states that you have to get these animals fixed.