Just an update on the trip to the vet....Mac has had all his bloods done, and although he is very small, the vet said his bloods are great, he is a normal happy little dog, and his heart is good.
She said that like humans, there are small people and big people, and she thinks that he may have something wrong with his growth, that makes him small, but that is how he is....
I have never felt better, he will be going to have surgery in about 3 months, castrated and teeth out...untill then i will see if he grows any....