I found the below script in one of the threads. It works fine except for one
thing. When you delete the contents of a cell, then the color does not
revert to No Fill.
Can anyone help? Thanks.
I tried adding this but it didn't work.

Case ""
Target.EntireRow.Interior.ColorIndex = 0


Private Sub Worksheet_Change(ByVal Target As Range)
Dim WatchRange As Range
Dim CellVal As String
If Target.Cells.Count 1 Then Exit Sub
If Target = "" Then Exit Sub
CellVal = Target
Set WatchRange = Range("A1:c100") 'change to suit

If Not Intersect(Target, WatchRange) Is Nothing Then
Select Case CellVal
Case "Dog"
Target.EntireRow.Interior.ColorIndex = 5
Case "Cat"
Target.EntireRow.Interior.ColorIndex = 10
Case "Other"
Target.EntireRow.Interior.ColorIndex = 6
Case "Rabbit"
Target.EntireRow.Interior.ColorIndex = 46
Case "Goat"
Target.EntireRow.Interior.ColorIndex = 45
End Select
End If
End Sub