First, you'll want to make sure the attributes you are looking for are set to 'Yes' for display on Kennel Card.

The number of attributes that will display on a kennel card is limited depending on which template (full-page vs. half-page) you select due to spacing/display constraints. 

If an animal has more than 4 attributes and you are seeing some display on your kennel cards that you do not want, you can edit the configuration for each attribute in Configuration > Processing > Attribute Manager then toggle Publish to Kennel Card to No. 

You may also want to make sure any additional attributes that don't show on the kennel card are described in the bio (kennel card / website memo) of the animal if you do want that information visible, but not as an attribute.