[cypher]

There is some confusing advice out there but I think daily veg is important, only small thumbnail size pieces & plenty of variety.
If the ham isn't used to fresh food then maybe once every few days to begin with is best.
Also something like a very small piece of plain cooked chicken once or twice a week is a good addition too.

ETA if you're not sure these are all safe

Safe veg, those marked * are relatively high in sugar so only feed to diabetes prone species as an occasional treat if at all.
Asparagus (mine have never liked this)
Basil
Broccoli
Brussels sprouts
Common or red clover
Cabbage, green or red
Carrot*
Cauliflower
Celery
Chard
Coriander
Courgette
Cress (not mustard & cress as commonly sold together)
Cucumber
Dandelion leaves & flowers
Endive/chicory
Green beans/runner beans
Kale
Pak choi/Bok choi
Parsley
Peas/mange tout/sugar snap/snow*
Peppers, any colour
Potato/sweet potato cooked only*
Radicchio
Spinach
Squash/pumpkin*
Swede
Sweet corn/baby corn*
Turnip