Apricots are for dangerous don't worry. But being that they are dried their sugar content increases making them not an overly good treat due to the amount of sugar. It is fine for him to have a couple of small pieces though.

Seems like Mr. Fister has a sweet tooth. He may like all kinds of fruit you never know right. If you want to give him fruit as a treat now and then I would avoid berries, grapes, & all citrus. Frest fruit is always better as a treat if you choose to give him fruit while sweet the sugar content is much much less than dried fruit.