Talking about his favorite foods etc. could be a way to humanize him for the benefit of a stranger abductor so he'll take good care of him and not hurt him, but it's a bit late in the game for that and it doesn't really make sense if they think Terri did it because she'd know all that stuff already and chosen not to care.
This is why I think TH had an accomplice who currently has Kyron. Terri isn't giving up info now that she has an attorney, so no they are appealing to her "partner in crime".