Cheyenne is 2 yrs old and Frisco is 12.5 with DM, almost down in his back legs, and with inflammatory bowel disease. Recent vet visit and bloodwork was good and he has been hanging in there for years (yes, he is a rare one with DM) and she said he is spunky and cheerful, still having some quality of life. He has a hearty appetite, loves to be with us, will drag himself to the door to go for car rides ( we dare never leave him behind or else he;ll give us ****
. Lounges outside when the weather is nice, can still control his urination and most of the time his bowels.
The problem is that Cheyenne growls and attacks him especially when he is having a bad day walking and manuevering around. Yesterday she was staring at him watching him at the end of the hallway for about 15 whole minutes. He was resting then moving around making a bit of noise and she was lying down while quietly watching him intensly (not with the stiff body, closed mouth, preattack mode). But all of a sudden she bolts over to him as he was coming forward and had her mouth on his head growling. I quickly pulled her off him and made her go to her spot and stay there. He was just full of saliva but never any puncture wounds. Regardless, he shouldn't have to deal with that so her prong collar is on all the time we are home now with a pull leash to correct her when she even looks like she is going to attack.
I had read that in the wild healthy dogs may single out the infirmed and weak who can't fight back to run them away.
Is this what may be happening here? Is it aggression or somethng else?
I will be keeping an eye on them all the time now. He has a great nature to him, a gentle giant. Other times they play and she will lick his face and lay down with him. He has on a help-em-up harness on him which is the best harness we have used in case anyone is looking for a lifting aid.
No verbal condemnations please just need your opinions as to if this is common. I'm trying to figure out the why's of her behavior. And , yes, she has had training by two excellent trainers who claim she is not agressive but she does have guarding issues so I pick up all items she may claim and give them their own while I watch them and pick them back up after they are done playing.