There’s No Good Reason for Dogs to Eat Lemon
Lemons should be not be fed to dogs for a number of reasons. First, lemon contains organic chemical compounds called psoralens which is toxic to dogs. The concentration of psoralens is higher in the seeds and skin but that doesn’t mean the flesh is safe for dogs to eat.
The citric acid found in lemons is also likely to cause problems in the dog’s digestive system, especially if they were to ingest a large amount of it. In the short-term, they may end up having diarrhea or vomiting as a result of eating lemons.
Most dogs aren’t going to like the bitter taste to begin with so don’t try and force your dog to eat it. The above doesn’t just apply to the lemon flesh. You should also avoid feeding your dog natural lemon juice.