Resource Guarding: Good collar and lead. Make her sit. Put the bowl down.
Don't let her have it. Make her stay in a sit. Give a good solid JERK of that lead.
Get her attention. Then let her have the food. You still have the lead.
Reach down, first growl? JERK the hell out of that lead give her a *LEAVE IT* command. Put her back in a sit.
Repeat above. Repeat until you can say LEAVE IT, she stops eating and when you can touch that bowl without he slightest hint of guarding. Growling/Biting: When you pick her up?
She growls/snaps? Put her back on the floor, pick her back up by the scruff (she is going to whimper/scream: ignore) support her bottom with your other hand, get her up to your face and give a good solid BACK OFF. If she tries to bite you while being hung by her scruff?
Go in deeper on the hold. Get direct eye contact. BACK OFF.
Now as far as those pee pads? Gross but her mother is calling the shots on that one. She is a little terror with a superior attitude.
Need to bring her BELOW that. And her precious little *spirit* is not going to be broken. You can also use prongs on small dogs but at this point I don't suggest it because I don't think you will need it.
ADD: I have had all kinds of small dogs. Dachshunds is one of them. These dogs are usually hell on 4 legs.
My 7 year old Dachshund was what you are dealing with now.
We never had any resource guarding or growling/nipping issues toward people with our toy breed. But he did get skittish around other large unfamiliar dogs and used to become snappish when they would bend to sniff him. When we first got him I was in the same situation as I'd only had large/giant breed dogs pretty well "How do we correct this little guy without over-correcting him?"
Mock bites work really well with him, sharp pokes and a stern voice. I think scruff corrections would have been a bit much for him as he does have a really soft temperament. But every dog is different, even some little dogs can tough attitudes to crack.
You might consider looking to see if the reactions are more fear based next time. If the dog is overly skittish you definitely don't want to over correct. I'm thinking this is more what this is about since the dog was being held, couldn't escape and had somebody coming down over his head.
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