How old is Tilly?
Buddy changed when he hit 1yr. I thought I had a mad dog on my hands
he started getting so aggressive. Did some reading on the subject and
bought a couple DVD's and learned about being ALPHA. Changed his
Yorkie Butt right back around
This breed, some at least, are strong
willed and want their own way at all times. Much like a spoiled skin
baby. Patience, determination and knowledge will really get Tilly back
on track.
If I can help in any way with what I have read let me know.
Be glad to help out.