I have a 1 year old maltese. Snowy is so tiny, but he thinks himself a big dog. When Barny, Melon and him meet new dogs, he is the first one to go and do the sniffing thing. He barks like crazy at strangers, and whenever the door bell rings ;p he is so funny with his naughty behavior. So I guess that he is useful.
My border collie is a barker too. Gotta admit that he is a great watch dog. People are always careful when passing by our house. He is a great companion when biking and roller blading -I don't move my legs when I roller blade with him coz he does all the pulling thing- Another useful dog.
Melon, WAs useful, but not anymore. She does nothing but to sleep, eat, go for short walks and nothing else. She's getting old I guess, but We love her like crazy.
Zeus looks cute and friendly
I'm sure that he is a great useful dog.