it is very hard to say how big your dog will get, but being part Aussie means it may carry the MDR1 mutation, and unless you do the DNA test for that, it's best to avoid any products with ivermectin, such as Heartguard. You can read more about this at www.busteralert.org
As for training, again it is hard to say since you probably don't know the parents of your puppy. What kind of temperament a pup inherits depends partly on the parents. Starting with a reward based training class as soon as the puppy has it's second shots would be a good place to start.
Answered by paws4hisglory - 3/24/2012 5:49:42 PM