There is no definite answer but probably not.There is for told to be over 150 breeds. Probably because they mix many breeds so you can keep counting up until there are no more combonations...which the list will probably be impossible to complete.
Yes, dog breeds and interbreed.
Yes. All dog breeds can get cancer.
Some dog breeds,if they dont have a thick coat,yes of course! Some dog breeds,if they dont have a thick coat,yes of course!
For most breeds, yes.
it is believed to have 355 breeds of dog including mix breeds.
Yes you can if it breeds with a smaller dog.
Yes, any breed (even mixed breeds) can enter in Agility.
yes they can
YES
Yes, all breeds of domestic dog are mammals.
yes, its called a xoloitzcuintli
Yes, a Poodle is a breed of dog. These include Standard Poodles, Toy Poodles, and other sub-breeds of Poodle.