Just in case anyone forgot: Chloe is 11 months old, Armani is 2.5 years old... I have had both (yorkies) since they were puppies. Armani is neutered (has been since 6 months old) Chloe was just spayed a few weeks ago. Armani was raised with the poodles and has always been good with other dogs... when I first got Chloe he wasnt super pleased but got over it pretty quickly and they have been perfect together... they love each other, lay together, lick each others faces, play, etc. Chloe has had a lot of contact with the poodles also and gets along well with them. Within the last month or so we had a few instances where Chloe snapped at Armani, there was always food or toys involved, she was removed from the situation for a few minutes and it ended as quick as it started. Today out of the blue she ONLY wants to attack him no matter what... it started over nothing... there was NO food or toys in sight... she just started attacking him... multiple times I put her in the crate and then let her back out and she attacked him immediately. She is super focused on him, I cant get her to focus on anything but him... she has this weird look in her eyes like she is possessed, I dont know I cant explain it. How can they go from loving each other to her wanting to kill him in literally minutes?! And I KNOW I am not handling it right... so tell me what I am supposed to do?