While lighting the boss's cigarette, a Hidden Mickey appears on the cuff of one of Ratigan's men (top left of the photo).
In the scene where Basil, Dawson, and Olivia are in the toy shop, and all the wind-up toys are started, Olivia follows some bubbles. The bubbles are being created by a hidden Dumbo toy. While Olivia is being led away by bubbles in the toy shop, three bubbles come together and form a classic Mickey.
The berries on the left side of the bush in this scene from the Fox & The Hound appear to be a classic Mickey... notice the one berry is larger than the other 2.
When the refrigerator falls on Roger's head, he sees birds. Look at the circles around the birds. They form a hidden mickey.