Pine (Pinus spp.) is not listed on the ASPCA toxic plant list for dogs (see below) or on several other sites that focus on pet health, such as lists from some veterinary medicine schools. A few unofficial sites do say that household pine oil, or sap from certain pines might cause problems. As for cedar, it would depend on the genus; true cedar is Cedrus, but many other plants are called cedar, such as junipers (red cedar); there is not much evident that the common name of cedar appears on toxic plant lists for dogs, nor the common name of juniper (Juniperus). For best advice, though, we'd recommend that you talk to your veterinarian about whether these trees/shrubs are toxic to dogs.
http://www.aspca.org/pet-care/animal-poison-control/dogs-plant-list
There is, of course, the possibility that your dog might inadvertently choke on the smaller pieces or smaller cones (nothing to do with toxin). In this light, especially if your dog is the enthusiastic type that does everything with gusto, it probably would be good to try to train him not to chew them.
Pine (Pinus spp.) is not listed on the ASPCA toxic plant list for dogs (see below) or on several other sites that focus on pet health, such as lists from some veterinary medicine schools. A few unofficial sites do say that household pine oil, or sap from certain pines might cause problems. As for cedar, it would depend on the genus; true cedar is Cedrus, but many other plants are called cedar, such as junipers (red cedar); there is not much evident that the common name of cedar appears on toxic plant lists for dogs, nor the common name of juniper (Juniperus). For best advice, though, we'd recommend that you talk to your veterinarian about whether these trees/shrubs are toxic to dogs.
http://www.aspca.org/pet-care/animal-poison-control/dogs-plant-list
There is, of course, the possibility that your dog might inadvertently choke on the smaller pieces or smaller cones (nothing to do with toxin). In this light, especially if your dog is the enthusiastic type that does everything with gusto, it probably would be good to try to train him not to chew them.