Is pine sap toxic for dogs?

There is always a chance that walking on pine needles could hurt your cat's paws, but it's unlikely.

Similarly, most of the time if a cat swallows a few pine needles, the sharp edges of the indigestible leaves will irritate its stomach, causing it to regurgitate them. Again, it's unlikely that this will harm the cat as a one-time event; but if yours is drawn to eating pine needles, it might not be a bad idea to separate the cat from the source of the temptation.