I found myself with a Chihuahua/terrier crossbreed - and while it isn't critical and has nothing to do with how much I've grown to love him (I was a cat person until this one captured my heart) - curiosity is killing me: Is there any way from observing physical or behavioral traits to tell whether his non-Chihuahua side is a Rat Terrier or Jack Russell Terrier? Is there a difference in coat, size, ears, coloring, how bouncy or affectionate, that might distinguish that . . . admittedly nitpicky curiosity of mine? =) If photos are requested, I'll post a couple to Photobucket and get them into the thread. PS - been reading the forum for a couple days now and already mad in love with your community!