some code before I ran out of time at work

code/modules/clothing/shoes/_shoes.dm

@@ -15,6 +15,10 @@
 	var/offset = 0
 	var/equipped_before_drop = FALSE
 
+	//CITADEL EDIT Enables digitigrade shoe styles
+	adjusted = NORMAL_STYLE
+	alternate_worn_icon = 'modular_citadel/icons/mob/digishoes.dmi'
+
 /obj/item/clothing/shoes/ComponentInitialize()
 	. = ..()
 	AddComponent(/datum/component/redirect, list(COMSIG_COMPONENT_CLEAN_ACT = CALLBACK(src, .proc/clean_blood)))
@@ -59,6 +63,11 @@
 		worn_y_dimension -= (offset * 2)
 		user.update_inv_shoes()
 		equipped_before_drop = TRUE
+	if(mutantrace_variation && ishuman(user))
+		var/mob/living/carbon/human/H = user
+		if(DIGITIGRADE in H.dna.species.species_traits)
+			adjusted = DIGITIGRADE_STYLE
+		H.update_inv_shoes()
 
 /obj/item/clothing/shoes/proc/restore_offsets(mob/user)
 	equipped_before_drop = FALSE

code/modules/mob/living/carbon/human/update_icons.dm

@@ -268,6 +268,7 @@ There are several things that need to be remembered:
 		inv.update_icon()
 
 	if(shoes)
+		var/obj/item/clothing/shoes/S = shoes
 		shoes.screen_loc = ui_shoes					//move the item to the appropriate screen loc
 		if(client && hud_used && hud_used.hud_shown)
 			if(hud_used.inventory_shown)			//if the inventory is open
@@ -281,6 +282,12 @@ There are several things that need to be remembered:
 		overlays_standing[SHOES_LAYER] = shoes_overlay
 	apply_overlay(SHOES_LAYER)
 
+var/obj/item/clothing/shoes/S = H.shoes
+			if(swap_back)
+					S.adjusted = NORMAL_STYLE
+				else
+					S.adjusted = DIGITIGRADE_STYLE
+				H.update_inv_w_uniform()
 
 /mob/living/carbon/human/update_inv_s_store()
 	remove_overlay(SUIT_STORE_LAYER)

code/modules/surgery/bodyparts/helpers.dm

@@ -298,5 +298,10 @@
 				else
 					U.adjusted = DIGITIGRADE_STYLE
 				H.update_inv_w_uniform()
-		if(H.shoes && !swap_back)
-			H.dropItemToGround(H.shoes)
+		if(H.shoes)
+			var/obj/item/clothing/shoes/S = H.shoes
+			if(swap_back)
+					S.adjusted = NORMAL_STYLE
+				else
+					S.adjusted = DIGITIGRADE_STYLE
+				H.update_inv_w_uniform()