Layla is my little girl, she is about 15 lbs and fine boned. Jango is very strong and is almost 30lbs (and not fat either). They were both a bit of work to house train but all other training was easy. I have a 3 year old and they are wonderful with her, as with all people. They both play Flyball (like a relay race for dog) and they love it. I would recomend playing sports with Buggs, it helps keep them active and it's a lot of fun.