[irvinhunt3]

Hello I recently just adopted a Lab/German Sheppard puppy. Her name is Trinity. She is 3 months old. I also have a King cavalier named Lebron who is 8 years old. From the go, Trinity has done things that have caught my eye. When petting Lebron, Trinity gets in front of him and tries to steal attention. She randomly nips and growls at him. She tries to eat out his bowl even though she has her own. When Lebron is laying in his bed she will lay right on top of him. Just recently in the cage together(wrong move), I came home and waited for them to calm down before letting them out trying not to promote barking as a way out. All of a sudden Trinity the puppy attacks Lebron and starts to maul him, grabbing him by the neck and pinning him down. After breaking the fight up, Lebron comes out limping and has tenderness in neck and hurt his leg. Then just now , I take Trinity outside for the bathroom like usual and she urinates but then she comes back inside and desecrates on my floor.
How do I correct this jealous/agressive behavior?
How do I properly potty train Trinity? (She sleeps in her crate solo at night now)

 

[LeoRose]

It sounds like the puppy has some pretty serious resource guarding going on. She doesn't want him near "her" things, be it you, food, or the bed. Redirecting her frustration at not being allowed out of the crate immediately is very concerning. This is an issue that can't be solved by random strangers on the internet. You really need to work with an in person trainer on this.

Housebreaking is a whole separate issue. Basically you need to take her out as soon as she wakes up in the morning or from a nap, after she eats, after she takes a big slurp of water, after she's been playing a while, and every 30 minutes or so just because. If you aren't there to be right on top of her, crate her.

You also need to make sure that she is empty before you bring her back in. At that age, puppies have a short attention span, and are easily distracted. If could be that she simply forgot she needed to poop while she was out.

Depending on the conditions she lived in before you got her, house training may be more difficult than usual. Puppies who's early experiences are in dirty conditions can be extremely hard to train.