Recently, I had a client whose resource-guarding dog reacted very differently depending on who in the household approached him when he had a toy. His responses varied with the species of the individual.
The other dogs in the house are watched closely if they come near the dog in question when he has a toy. He will go still except for his eyes, which track their every move. If they try to pick up one of his toys, he will growl and charge at them. He will take toys from them and hoard them even if they all started out with matching toys given to them by the guardians. If you only saw him around other dogs, he presents as a classic high-level resource guarder—what’s mine is mine, what’s yours is mine. However, he reacts very differently to the other two species sharing his home.
The human adults and the child in the household can do whatever they want with this dog’s toys. They can pick them up, remove them from the dog’s mouth, walk by them or even step on them. The dog is completely relaxed no matter what happens to his toys at the hands (or the feet) of the people in his family.
The cat can walk by toys, approach the dog while he is playing with a toy or even cuddle up with him when he has one without eliciting any reaction. If she picks up a toy up or lies down on top of one, the dog rushes over and takes it.
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This dog lets people do anything related to toys, and lets the other dogs in his house do nothing related to them, but takes an intermediate stance with the cat. He is unwilling to tolerate the cat taking possession a toy, but as long as she does not attempt to do that, he does not object. It’s difficult to know exactly why this dog behaves as he does, though I think it’s safe to assume that he does not regard the dog as a human/dog cross. It’s possible that the dog’s actions are based on species, but the differences may simply reflect his response to each of the individuals in his multi-species household.
Do you have a dog who reacts differently to the various species in your home when they approach his toys?