Lil' Doggies consist of a mini hot dog in a mini hot dog bun and is available with various topping combinations: Ketchup & Mustard, Chili Cheese, and Cheesy Bacon (cheese sauce and bacon).
Lil' Chickies feature a crispy chicken strip in the same mini hot dog bun and comes in the following varieties: Mayo & Pickles, Buffalo, and Honey BBQ Bacon.
Both Lil' Doggies and Lil' Chickies can be found for a limited time only at $1.49 a piece.
I tried them the last time they came around. You can find my review of Lil' Chickies here and Lil' Doggies here.
Photo via Sonic.