Can dogs eat lemons
Dogs should not eat lemon, but small amounts wont hurt them.
Although lemons wont hurt your dog, it is not recommended that you give them any. They are very high in acidity, which can cause stomach aches.
Lemon seeds contain cyanide so they are poisonous to dogs.
Info for this post taken from: http://dogseat.net/can-dogs-eat-lemons/