Cat food is high in protein and very appealing to dogs. It is also very bad for them, the protein content is much too high and will damage the kidneys.

Cats are not very economical digesters, so their poops are also high in protein and so also very appealing to dogs.

You must keep the dogs away from the cat food and litter boxes. Baby gates work well for this! My home is full of 'dog free zones.' I am constantly stepping OVER a gate.