Ham — Food safety facts
Feed with care · Dogs · full breakdown on the linked food page
Very salty and fatty. A tiny treat occasionally, never regular — salt poisoning is possible in small dogs.
Short answer
Yes, a small piece of ham can be given as an occasional treat, but it should not become a regular part of the diet. Ham is very salty and fatty, so only a tiny bite is appropriate. Watch your dog for vomiting, diarrhea, excessive thirst or lethargy, especially if he is a small breed. If any of those signs appear, contact your veterinarian.