size difference

I am researching a future female dog. However, not all puppies come from a breeder, some of them were accidental pairings which lead to mixed breeds. Is there any way to know with decent accuracy how large a puppy will be? For example, let's say the mom was 110 pounds and the dad was only 60...

Hey, sorry if this is a repost I couldn’t find one like it. Could I have a full sized mare and a much smaller stallion together in the same stall? I’m looking to own in the future (in my own stable) and since a companion is necessary would a quarter horse mare and a Shetland pony stallion get...