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  I know what you are going through..Riley did all that when he was a puppy. well except barking on a walk.(I think he was to scared to bark) it was bad. and he came to us that way. I think he may have been mistreated, he was 14 weeks old and I know for a fact this women gave them no interaction. this was a puppy mill I was trying to help shut down. so when potential buyers were around, thats the only time they got out of a cage. anyway, bottom line, he was sick and totally scared of EVERYTHING especially humans. I watch a lot of the dog whisperer. so I used some of the tricks on there, the first thing I learned was  when the dog is acting scared and, Riley would shake like crazy it was sooo sad. you absolutely NEVER EVER!! pet them and tell them it is ok! If your dog is scared and shaking or crouching or just acting scared and you give him affection at that moment, you are actually telling the dog that this behavior is good. So you want to wait untill they stop acting scared, when the dog starts to calm down and stops acting scared, the second you see this that is when you give him affection. and I did this faithfully with Riley, and it is hard I know, because you feel so dam bad for them, but Riley stopped acting so scared all the time after I started this. it wont work over night, but if you are consistent you will   start to see an improvement before you know it..hope this helps.  
				__________________  LISA,  MOM TO RILEY BLUE & BELLA MIA   |