Updated May 09, 2016. Cecum cancer is a type of colon cancer, but the signs and symptoms of this disease are sometimes elusive. The cecum demarcates the beginning of your large intestine. This pouch-like section of intestine connects a portion of the small intestine, called the ileum, to the ascending colon.
Most good breeders don't let their puppies leave until around 8 weeks of age (and in toy breeds, 10 or 12 weeks), which means that your puppy may not have been leash trained prior to you picking him up. For large breeds, this may not be the case.
A good breeder should take the proper time to socialize, house train, and accustom the puppy to leashes and other restraint objects and if done for at least 8-9 weeks (or longer, which is better) the dog will be much better suited for adoption and have far less issues for their human companions in the future.