diff --git a/docs/changelog.txt b/docs/changelog.txt
index 57e1ed9e1..c7069e272 100644
--- a/docs/changelog.txt
+++ b/docs/changelog.txt
@@ -68,7 +68,7 @@ Template for new versions:
 - `buildingplan`: display how many items are available on the planner panel
 - `buildingplan`: clarify interface when building single-tile staircases
 - `sort`: allow searching by profession on the squad assignment page
-- `sort`: add search for work animal assignment screen; allow filtering by miltary/civilian
+- `sort`: add search for work animal assignment screen; allow filtering by miltary/squad/civilian/burrow
 - `dreamfort`: Inside+ and Clearcutting burrows now automatically created and managed
 
 ## Documentation
diff --git a/docs/plugins/sort.rst b/docs/plugins/sort.rst
index 4833cbf83..95033d949 100644
--- a/docs/plugins/sort.rst
+++ b/docs/plugins/sort.rst
@@ -102,7 +102,8 @@ The Info overlay adds search support to many of the fort-wide "Info" panels
 name (with either English or native language last names), profession, or
 special status (like "necromancer"). If there is text in the second column, you
 can search for that text as well. This is often a job name or a status, like
-"caged".
+"caged". The work animal assignment page can also filter by squad or burrow
+membership.
 
 Interrogation overlay
 ---------------------
diff --git a/plugins/lua/sort/info.lua b/plugins/lua/sort/info.lua
index f9233bf6c..9110ec825 100644
--- a/plugins/lua/sort/info.lua
+++ b/plugins/lua/sort/info.lua
@@ -161,9 +161,35 @@ InfoOverlay = defclass(InfoOverlay, sortoverlay.SortOverlay)
 InfoOverlay.ATTRS{
     default_pos={x=64, y=8},
     viewscreens='dwarfmode/Info',
-    frame={w=40, h=5},
+    frame={w=40, h=6},
 }
 
+local function get_squad_options()
+    local options = {{label='Any', value='all', pen=COLOR_GREEN}}
+    local fort = df.historical_entity.find(df.global.plotinfo.group_id)
+    if not fort then return options end
+    for _, squad_id in ipairs(fort.squads) do
+        table.insert(options, {
+            label=dfhack.military.getSquadName(squad_id),
+            value=squad_id,
+            pen=COLOR_YELLOW,
+        })
+    end
+    return options
+end
+
+local function get_burrow_options()
+    local options = {{label='Any', value='all', pen=COLOR_GREEN}}
+    for _, burrow in ipairs(df.global.plotinfo.burrows.list) do
+        table.insert(options, {
+            label=#burrow.name > 0 and burrow.name or ('Burrow %d'):format(burrow.id + 1),
+            value=burrow.id,
+            pen=COLOR_YELLOW,
+        })
+    end
+    return options
+end
+
 function InfoOverlay:init()
     self:addviews{
         widgets.BannerPanel{
@@ -181,7 +207,7 @@ function InfoOverlay:init()
             },
         },
         widgets.BannerPanel{
-            view_id='filter_panel',
+            view_id='subset_panel',
             frame={l=0, t=1, r=0, h=1},
             visible=function() return self:get_key() == 'PET_WA' end,
             subviews={
@@ -194,7 +220,55 @@ function InfoOverlay:init()
                         {label='All', value='all', pen=COLOR_GREEN},
                         {label='Military', value='military', pen=COLOR_YELLOW},
                         {label='Civilians', value='civilian', pen=COLOR_CYAN},
+                        {label='Burrowed', value='burrow', pen=COLOR_MAGENTA},
+                    },
+                    on_change=function(value)
+                        local squad = self.subviews.squad
+                        local burrow = self.subviews.burrow
+                        squad.visible = false
+                        burrow.visible = false
+                        if value == 'military' then
+                            squad.options = get_squad_options()
+                            squad:setOption('all')
+                            squad.visible = true
+                        elseif value == 'burrow' then
+                            burrow.options = get_burrow_options()
+                            burrow:setOption('all')
+                            burrow.visible = true
+                        end
+                        self:do_search(self.subviews.search.text, true)
+                    end,
+                },
+            },
+        },
+        widgets.BannerPanel{
+            view_id='subfilter_panel',
+            frame={l=0, t=2, r=0, h=1},
+            visible=function()
+                local subset = self.subviews.subset:getOptionValue()
+                return self:get_key() == 'PET_WA' and (subset == 'military' or subset == 'burrow')
+            end,
+            subviews={
+                widgets.CycleHotkeyLabel{
+                    view_id='squad',
+                    frame={l=1, t=0},
+                    key='CUSTOM_SHIFT_S',
+                    label='Squad:',
+                    options={
+                        {label='Any', value='all', pen=COLOR_GREEN},
                     },
+                    visible=false,
+                    on_change=function() self:do_search(self.subviews.search.text, true) end,
+                },
+                widgets.CycleHotkeyLabel{
+                    view_id='burrow',
+                    frame={l=1, t=0},
+                    key='CUSTOM_SHIFT_B',
+                    label='Burrow:',
+                    options={
+                        {label='Any', value='all', pen=COLOR_GREEN},
+                    },
+                    visible=false,
                     on_change=function() self:do_search(self.subviews.search.text, true) end,
                 },
             },
@@ -296,8 +370,10 @@ function InfoOverlay:updateFrames()
     local frame = self.subviews.panel.frame
     if frame.l == l and frame.t == t then return ret end
     frame.l, frame.t = l, t
-    local frame2 = self.subviews.filter_panel.frame
+    local frame2 = self.subviews.subset_panel.frame
     frame2.l, frame2.t = l, t + 1
+    local frame3 = self.subviews.subfilter_panel.frame
+    frame3.l, frame3.t = l, t + 2
     return true
 end
 
@@ -323,10 +399,20 @@ function InfoOverlay:matches_filters(unit)
     local subset = self.subviews.subset:getOptionValue()
     if subset == 'all' then
         return true
-    elseif unit.military.squad_id == -1 then
-        return subset == 'civilian'
+    elseif subset == 'civilian' then
+        return unit.military.squad_id == -1
+    elseif subset == 'military' then
+        local squad_id = unit.military.squad_id
+        if squad_id == -1 then return false end
+        local target_id = self.subviews.squad:getOptionValue()
+        if target_id == 'all' then return true end
+        return target_id == squad_id
+    elseif subset == 'burrow' then
+        local target_id = self.subviews.burrow:getOptionValue()
+        if target_id == 'all' then return true end
+        return utils.binsearch(unit.burrows, target_id)
     end
-    return subset == 'military'
+    return true
 end
 
 -- ----------------------