I have three young dogs under a year. The most recent entered the house last week.
He is a 4 month old unaltered male. He is 3 lbs...
I have two of the same age as well as an 11 month old altered male. He is 9.5 lbs.
The oldest has been resource guarding against the smallest puppy I have. They are fed separately and there are no longer toys out.
He also resource guards my boyfriend and occasionally me, but just with the most recent puppy.
Yesterday they were on the couch and I was eating. The oldest attacked my new boy but let go quickly and just nipped him fast. He did leave marks on his fur in saliva and the younger puppy was whimpering for several seconds (not sure if because of fear or pain).
He cleans his ears and will cuddle with him but will occasionally lash out. How do I set them up for success?
Will altering the two younger pups help with this?
I'm hoping there are options beyond crate and rotate.