We had a dachshund for 14 years. He bit my mum, my sister and a neighbour during this time. He was abused and very protective of my mother.

He bit my mother when she went to pass him to my dad on the very first day. He had never been around a male before. He was secluded in a kennel as he wasn't "show-worthy" so he was just fed and ignored. He simply was scared.

Second time was my sister. He woke up to see her face right near his. Again, he was scared and reacted.

The third time was a neighbour walked into our house without permission (he had dementia). He was scared as the neighbour tried to hit him with a walking stick.

Try to think back. Was he protecting your DD? Did you come up to him unexpectedly?

Dachshunds usually are very protective of their "family", especially their favourite and can react when they feel unsafe or their family is unsafe.

Also, have you ruled out he is unwell? Is he losing his sight? How old is he? Also, stress can be a factor.

Dogs are always a risk but IMO, very worth it. You will need to monitor him closely from now on if you keep him and I would recommend training so he is aware of who is head of his pack as they can believe they are top dog.

I hope your arm recovers quickly.

Good luck with your decision