The oil produced by some fir trees is mildly toxic and may cause your dog to vomit or drool excessively if ingested.
It is best to choose a Christmas tree that does not fall off, lest the sharp nails accidentally stick into the pet's PAWS, or be eaten by the pet and cause internal damage.
Tree decorations can also be dangerous for your puppy.
These gadgets look an awful lot like your dog's favorite ball toys, so your dog may not be able to tell them apart until they bite into the glass ball or step on a broken ornament and damage the paw pad.
Wrapping paper, ribbons, and tinsel may be your dog's favorite things to play with, but please keep them away from these items as they can cause tummy upset. So make sure they're out of reach or tucked away.