One of our greyhounds gets very obsessive over squeaky toys. He's not our first greyhound, but he's the first one to be like this. He doesn't resource-guard the toys because we don't put him in the position of feeling like he needs to. (I.e. we "trade up" when we need to take a toy away from him) It's more like the noise triggers him, flips some aspect of prey drive in his brain, so he HAS to go get the squeaky thing. Like, must kill, must kill, gotta have it, where is it!

And he has a very long memory. Once I was playing with him in the back yard and squeaked a squirrel call (one time) and immediately hid it. He looked around me, around the woodpile that I was standing near, he stood and stared up into the tree near where I was. Looked behind the woodpile, reared up to try to look over it, looked around it again. I went into the house and checked 5 minutes later and he was still staring up at the tree and around the woodpile.

It's a problem because now we have two greyhounds and our new girl also likes squeaky toys. We have to be extremely vigilant to keep them separated because he gets triggered by both toys squeaking and will run over to her and take hers away, which would trigger a fight. So far we've managed to avoid that escalating into a fight by yelling at him and he veers off. But he keeps heading over to her and then remembering that he shouldn't ... heads back the next time she squeaks and then stops, going back and forth like that. But it must be frustrating for him.

I've separated them for playtime, one dog in the house, the other one in the yard. He can hear her playing and starts to obsess about not being able to go find the squeaking. He doesn't bash into the door or anything, but clearly gets frustrated.

So... what's the solution? No squeaky toys? Or is there a way to train out this kind of obsession?